跟讀練習: Every Mobile Network Explained in 8 Minutes - 通過影片學習英語口語
選擇練習模式
每種模式都會開啟全屏練習室。
80 句
如果句子過短或過長，請點選 Edit 進行調整。
1
1G.
2
1G, or first generation, came out in the early 1980s, and this was the first time people could call someone wirelessly.
3
It was created because back then, phones were still connected to cables, meaning you could only make calls from certain places like homes or offices, which made phone calls inconvenient.
4
That's why the 1G mobile network was created, allowing people to make phone calls wirelessly.
5
And all of this was possible because 1G used analog transmission, which converted your voice into radio signals and sent the signal through the air.
6
However, even though 1G phones were portable, they were still thick and heavy compared to the phones we use today.
7
And unlike phones with modern mobile networks that already support internet access, navigation, and online gaming, 1G was designed literally only for voice calls.
8
It couldn't even send text messages, which is why 1G phones only had a small screen mainly for showing numbers during calls.
9
And despite being specifically made for voice calls, the 1G network had many problems.
10
For example, during phone calls, voices could sound unclear because analog radio signals often picked up noise and echoes.
11
On top of that, the 1G network has no encryption feature yet.
12
So if someone had a radio scanner and scanned your phone's radio frequency, they could listen to your phone call without you knowing.
13
Another problem was that you could only talk for around 20 to 30 minutes before the phone died.
14
That's because the analog technology in 1G had to continuously convert your voice into radio signals and transmit them.
15
And this used a lot of energy.
16
So in the end, since 1G and its phones had too many problems, the 2G network was created later to fix those issues.
17
2G.
18
2G came out in the early 1990s, and this is where mobile networks switched from analog to digital signals.
19
So instead of sending your voice as radio waves like in 1G, which made calls sound distorted and easy to eavesdrop on,
20
2G converted your voice into digital data that sounded much clearer and more secure.
21
And since 2G used digital signals, phones could finally send SMS text messages.
22
And this feature was great because sometimes people just wanted to say something briefly without having to make a call.
23
Other than that, 2G also introduced mobile data.
24
The earliest version was called GSM, but the data speed was only around 14.4 kilobits per second, which was extremely slow and not enough for real internet browsing yet.
25
Later on, GSM was upgraded to GPRS, or also known as 2.5G, which increased speeds to around 80 kilobits per second.
26
After that, it was upgraded again to Edge, or 2.75G, and this time the speed could reach up to 200 kilobits per second.
27
However, even with these upgrades, 2G was still too slow for browsing the internet.
28
And not only that, it also had a very high latency, so when you click something, the response felt delayed and unresponsive.
29
And to make it worse, websites back then had to be typed manually, letter by letter.
30
So in the end, as more and more people started using the internet, the 2G network was no longer capable, which is why it was replaced by 3G later.
31
3G 3G came out in the early 2000s, and this is the first mobile network that was made for internet use.
32
So unlike 2G that was mainly only for calling and texting, 3G was already capable of handling things like email, browsing websites, and even social media.
33
This is possible because the data speed of 3G could reach around 384 kilobits per second, which is much faster than 2G.
34
Later on, the regular 3G was upgraded to HSPA and HSPA+, or 3.5G and 3.75G.
35
With these upgrades, 3G speeds could reach around 5 to 10 megabits per second, which was enough for things like watching early YouTube videos and making basic video calls.
36
However, even with these improvements, 3G speeds were often unstable, especially when many people were online at the same time.
37
As a result, people often had to watch online videos or view images in lower resolutions.
38
And since apps and online features became more and more demanding, the 3G network and its phones couldn't handle them anymore.
39
That's why 4G was created later.
40
4G.
41
4G, which also known as LTE, came out around 2010.
42
And this is the network generation that created the smartphone era.
43
So unlike 3G that could connect to the internet but was often unstable, 4G was built with the internet as the main focus.
44
This is why 4G has much higher speeds,
45
typically around 10 to 100 megabits per second and later upgrades like 4G plus could reach up to 300 megabits per second.
46
With this people could stream higher resolution videos, download and upload large files, and even play online games smoothly.
47
Also, if you take a look at 4G phone designs compared to the previous generation, you'll notice that most 4G phones use large touchscreens instead of many physical buttons.
48
This happened because the higher speeds of 4G made phones capable of handling heavier
49
and more complex apps like map navigation or video conferencing.
50
And since these complex apps required scrolling, gesture controls and zooming, touchscreens became the natural interface during the 4G era.
51
And not just speed, 4G is also more stable than 3G.
52
This is because 4G networks were designed to serve many users at once more efficiently, so when lots of people are online at the same time,
53
the connection doesn't get congested as easily as 3G.
54
But of course, in very crowded places like stadiums or busy city areas, 4G can still slow down and become overloaded.
55
And this congestion is becoming even more common as 4G smartphone users keep increasing every year, which is why 5G was created later.
56
5G.
57
5G came out in 2020, and this network is commonly used in mid-range to high-end smartphones today.
58
Its speed can reach hundreds of megabits per second and even go beyond gigabit levels.
59
And not only that, in a very crowded area where many people are online at the same time, 4G speeds can drop significantly, while 5G remains more stable.
60
Also, 5G can deliver data with very low latency, usually around 15 to 30 milliseconds in real-world conditions.
61
This is especially useful when you need an instant response, such as when playing competitive online games or using Google Maps with constant position updates.
62
Also, during a disaster or when someone is lost, rescue teams can use a 5G connection to control a drone and view its live camera feed with almost no delay.
63
In comparison, 4G latency can sometimes spike randomly, which makes things feel laggy and less responsive.
64
However, despite all these improvements, 5G coverage is still not as wide as older networks like 4G or 3G, and that's normal.
65
Since 5G is relatively new, its infrastructure is still expanding.
66
This means that in more remote or rural areas, you often won't get a 5G signal, even if your phone supports 5G, so your device will fall back to 4G or 3G instead.
67
But even if you don't have 5G, 4G is enough for everyday tasks anyway, especially for casual users who watch videos or browse social media,
68
since those activities don't require extreme speeds.
69
6G 6G is the next generation after 5G, and unlike previous generations, it does not exist as a consumer mobile network yet.
70
Instead, 6G currently exists at the research and infrastructure level, such as in satellites and laboratory networks.
71
So right now, the main users of 6G are just research teams, large tech companies, and governments.
72
In theory, 6G speeds could reach hundreds of gigabits per second, and in laboratory conditions, even up to 1 terabit per second.
73
Also, it is said that 6G will be using an AI-integrated network system that can automatically optimize connections, predict demands, and manage traffic for many users.
74
Because of this, 6G usage is not really about everyday phone apps anymore, but more about large-scale systems like scientific research and advanced automation.
75
And based on how mobile networks evolve roughly every 10 years, 6G is expected to reach consumer devices around 2030.
76
However, I gotta say that having 6G on your phone isn't really important anyway.
77
Because today, even 5G is already very fast and offers low latency.
78
And for most people, 4G is still more than enough for casual tasks like social media, messaging, or music streaming.
79
Even for heavier activities like video calls or watching long videos on YouTube, most people will simply switch to Wi-Fi anyway.
80
Oh by the way, I made some other cool videos too, so don't forget to watch them later, okay?
FOR YOU
推薦影片
B228
123 句
Steve Jobs introduces iPhone in 2007
Business EnglishUniversity StudentsWorking Adults
B13
31 句
Introduction to Networking | Network Fundamentals Part 1 (Revised)
Business EnglishUniversity StudentsWorking Adults
B21
69 句
Will YouTube Ever Run Out Of Video IDs?
British AccentBusiness EnglishUniversity StudentsWorking Adults
B22
188 句
How A Million Miles Of Undersea Cables Power The Internet — And Now AI
Business EnglishDaily ConversationUniversity Students
B24
31 句
What happens to old electronic devices when you upgrade?
Business EnglishDaily ConversationUniversity Students
B22
532 句
your home router STILL SUCKS!! (use OPNsense instead)
Business EnglishUniversity StudentsWorking Adults
B21
96 句
The weird history of the internet...
American AccentBusiness EnglishUniversity StudentsWorking Adults
B214
6 句
The Setting That Gives You Back an Hour a Day
Business EnglishDaily ConversationUniversity Students
B288
39 句
How Has Technology Made Our Lives Easier?
Business EnglishDaily ConversationUniversity Students
B22
110 句
How Do QR Codes Work?
Business EnglishUniversity StudentsWorking Adults
B210
272 句
The Best TINY Tech on the Internet!
British AccentBusiness EnglishUniversity StudentsWorking Adults
C19
265 句
How are Microchips Made? 🖥️🛠️ CPU Manufacturing Process Steps
Business EnglishUniversity StudentsWorking Adults
本課的詞彙與口語要點
這節 B2 級別的口語課以影片“Every Mobile Network Explained in 8 Minutes”為素材。 影片中反覆出現的詞有：network, speed, online, signal, mobile。 這段影片共有 80 個句子、1446 個單詞可供跟讀。 講話部分時長為 8:13。 說話人語速自然，每分鐘約 176 個詞，接近日常對話。 只有 80% 的單詞屬於英語最常用的 3,000 詞，詞彙難度較高。
影片中的重點詞彙
影片中最難的 15 個單詞，附發音和釋義：
| 單詞 | 發音 | 釋義 |
|---|---|---|
| latency 名詞 | /ˈleɪ.tən.si/ | 延遲 /延遲 |
| browse 動詞 | /bɹaʊz/ | 隨便看 /隨便看, 閒逛 /閒逛 |
| analog 形容詞 | /ˈænəlɔɡ/ | 模擬 /模擬, 類比 /類比 |
| smartphone 名詞 | /ˈsmɑɹtfoʊn/ | 智慧手機 /智慧手機, 智慧型手機 /智慧型手機 |
| litter 名詞 | /ˈlɪt.ɚ/ | 墊料 |
| navigation 名詞 | /nævɪˈɡeɪʃən/ | 導航 /導航 |
| distort 動詞 | /dɪsˈtɔːt/ | 歪曲 |
| eavesdrop 動詞 | /ˈivzˌdɹɑp/ | 偷聽 /偷聽, 竊聽 /竊聽 |
| inconvenient 形容詞 | /ˌɪn.kənˈviːni.ənt/ | 不方便, 不便 |
| millisecond 名詞 | /ˈmɪlɪˌsɛkənd/ | 毫秒 |
| optimize 動詞 | /ˈɑptɪmaɪz/ | 最佳化 |
| overload 動詞 | /ˌəʊvəˈləʊd/ | 超載 /超載 |
| scanner 名詞 | /ˈskænə/ | 掃描器 /掃描器 |
| encryption 名詞 | /ɪnˈkɹɪpʃən/ | 加密 |
| manually 副詞 | /ˈmænj(u)əliː/ | 手動地 |
影片中出現的短語動詞
| 單詞 | 發音 | 釋義 |
|---|---|---|
| come out 動詞 | /ˌkʌm ˈaʊt/ | 出, 出來 /出來 |
| pick up 動詞 | 拾取, 撿 /撿 | |
| slow down 動詞 | 減速 /減速, 放慢 |
影片中的語法
說話人最常用的結構，並附上影片中的原話：
| 結構 | 影片中的用法 |
|---|---|
| 被動語態 be + 過去分詞 — 強調發生了什麼，而不是誰做的 | was created · was designed · being specifically made |
| 定語從句 who / which + 從句 — 補充說明人或事物 | messages, which is · second, which was · capable, which is |
需要注意的發音
說話人用了 10 次縮略和弱讀形式，例如 don't, couldn't, doesn't。請按聽到的簡短形式來說。
- “sh” 和 “zh” 音: navigation /nævɪˈɡeɪʃən/, encryption /ɪnˈkɹɪpʃən/, automation /ˌɔ.təˈmeɪ.ʃən/
- 長單詞——注意重音位置: navigation /nævɪˈɡeɪʃən/, inconvenient /ˌɪn.kənˈviːni.ənt/, millisecond /ˈmɪlɪˌsɛkənd/, manually /ˈmænj(u)əliː/, automation /ˌɔ.təˈmeɪ.ʃən/
中文母語者容易讀錯的音：
- /v/ — 不要讀成 /w/，上齒輕觸下唇: convert /kənˈvɝt/, navigation /nævɪˈɡeɪʃən/, eavesdrop /ˈivzˌdɹɑp/, inconvenient /ˌɪn.kənˈviːni.ənt/, overload /ˌəʊvəˈləʊd/
- 詞尾子音 — 要讀清楚，後面不要加母音: megabit /ˈmɛɡəbɪt/, browse /bɹaʊz/, analog /ˈænəlɔɡ/, convert /kənˈvɝt/, gigabit /ˈɡɪɡəbɪt/
- /r/ 和 /l/ 的區別: scroll /skɹoʊl/, randomly /ˈɹændm̩li/, portable /ˈpɔɹtəbəl/
如何用這段影片練習
- 先完整聽一遍影片，不要開口，記下不認識的單詞。
- 先用 0.75 倍速逐句跟讀，熟練之後再回到正常速度。
- 錄下自己的聲音並與原聲對比，特別注意 latency, browse, analog 這類單詞。
什麼是跟讀法？
跟讀法 (Shadowing) 是一種有科學依據的語言學習技巧，最初開發用於專業口譯員的培訓，並由多語言者Alexander Arguelles博士普及。這個方法簡單而強大：您在聽英語母語原聲的同時立即大聲重複——就像是一個延遲1-2秒緊跟說話者的影子。與被動聽力或語法練習不同，跟讀法強迫您的大腦和口腔肌肉同時處理並模模擬實的講話模式。研究表明它能顯著提高發音準確性，語調，節奏，連讀，聽力理解和口語流利度——使其成為雅思口語備考和真實英語交流最有效的方法之一。