跟读练习: How can you generate predictable Random numbers? #javalanguage #javacoding #javatips - 通过视频学习英语口语
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15 句
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Question 398.
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How can you generate repeatable random numbers?
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Short answer.
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A series of random numbers is always repeatable.
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Less short answer.
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When you create an instance of the random class,
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you initialize the series of random numbers that you can get one at a time with the various methods of the class,
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next int, next double and the like.
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You can give a seed when you create this instance and for a given seed you will always get the same series.
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This may be very useful when you want to write tests for instance.
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If you do not provide any seed then the seed is generated from system .nanotime.
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One last word, predictability is a different topic.
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Having non -predictable random series is harder than it seems.
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We can use the SecureRandom class instead of Random, which is the preferred random generator for cryptographic and security applications.
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The series it generates still depends on a seed, but it's harder to predict.
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本课的词汇与口语要点
这段视频共有 15 个句子、161 个单词可供跟读。 讲话部分时长为 1:10。 说话人语速平稳，每分钟约 138 个词，很适合跟读。 83% 的单词属于英语最常用的 3,000 词，其余的词建议在练习前先学一下。
视频中的重点词汇
视频中 9 个值得学习的单词，附发音和释义：
| 单词 | 发音 | 释义 |
|---|---|---|
| topic 名词 | /ˈtɑpɪk/ | 主題 /主题, 話題 /话题 |
| depend 动词 | /dɪˈpɛnd/ | 信任, 信賴 /信赖 |
| predict 动词 | /pɹɪˈdɪkt/ | 預言 /预言 |
| generator 名词 | /ˈdʒɛnəɹeɪtə(ɹ)/ | 發電機 /发电机 |
| predictable 形容词 | /pɹəˈdɪktəbləl/ | 可預見的 /可预见的, 可預言的 /可预言的 |
| cryptographic 形容词 | 密碼學的 /密码学的 | |
| initialize 动词 | /ɪˈnɪʃəlaɪz/ | 初始化 |
| random 形容词 | /ˈɹændəm/ | 隨機 /随机 |
| prefer 动词 | [pɹɪˈfɝ] | 比較喜歡 /比较喜欢 |
视频中的语法
说话人最常用的结构，并附上视频中的原话：
| 结构 | 视频中的用法 |
|---|---|
| 被动语态 be + 过去分词 — 强调发生了什么，而不是谁做的 | is generated |
| 定语从句 who / which + 从句 — 补充说明人或事物 | Random, which is |
需要注意的发音
- 长单词——注意重音位置: generator /ˈdʒɛnəɹeɪtə(ɹ)/, predictable /pɹəˈdɪktəbləl/, repeatable /ɹɪˈpiːtəbəl/, initialize /ɪˈnɪʃəlaɪz/, predictability /pɹəˌdɪktəˈbɪlɪti/
如何用这段视频练习
- 先完整听一遍视频，不要开口，记下不认识的单词。
- 用正常速度逐句跟读，每句重复到你的节奏与说话人一致为止。
- 录下自己的声音并与原声对比，特别注意 topic, depend, predict 这类单词。
什么是跟读法？
跟读法 (Shadowing) 是一种有科学依据的语言学习技巧，最初开发用于专业口译员的培训，并由多语言者Alexander Arguelles博士普及。这个方法简单而强大：您在听英语母语原声的同时立即大声重复——就像是一个延迟1-2秒紧跟说话者的影子。与被动听力或语法练习不同，跟读法强迫您的大脑和口腔肌肉同时处理并模仿真实的讲话模式。研究表明它能显着提高发音准确性，语调，节奏，连读，听力理解和口语流利度——使其成为雅思口语备考和真实英语交流最有效的方法之一。