쉐도잉 연습: How can you generate predictable Random numbers? #javalanguage #javacoding #javatips - 영상으로 영어 말하기 배우기
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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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Vocabulary and speaking notes for this lesson
This video has 15 sentences and 161 words to shadow. The speech runs for 1:10. The speaker talks at a steady 138 words per minute, a comfortable pace for shadowing. 83% of the words are among the 3,000 most common in English; the rest is worth studying before you start.
Key vocabulary in this video
13 words from the video worth learning, with pronunciation and meaning:
| Word | Pronunciation | Meaning |
|---|---|---|
| generate verb | /ˈd͡ʒɛn.ə.ɹeɪt/ | To bring into being; give rise to. |
| topic noun | /ˈtɑpɪk/ | A subject; a theme; a category or general area of interest. |
| depend verb | /dɪˈpɛnd/ | To be contingent or conditioned; to have something as a necessary condition |
| predict verb | /pɹɪˈdɪkt/ | To make a prediction: to forecast, foretell, or estimate a future event on the basis of knowledge and reasoning; to prophesy a future event on the basis of… |
| generator noun | /ˈdʒɛnəɹeɪtə(ɹ)/ | An apparatus in which vapour or gas is formed from a liquid or solid by means of heat or chemical process, as a steam boiler, gas retort etc. |
| predictable adjective | /pɹəˈdɪktəbləl/ | Able to be predicted. |
| repeatable adjective | /ɹɪˈpiːtəbəl/ | Able to be repeated. |
| cryptographic adjective | Relating to cryptography. | |
| initialize verb | /ɪˈnɪʃəlaɪz/ | To assign initial values to something. |
| predictability noun | /pɹəˌdɪktəˈbɪlɪti/ | The characteristic of being predictable. |
| random adjective | /ˈɹændəm/ | Occurring for no particular reason; haphazard, unpredictable. |
| instance verb | /ˈɪnstəns/ | To mention as a case or example; to refer to. |
| prefer verb | [pɹɪˈfɝ] | To be in the habit of choosing something rather than something else; to favor; to like better. |
이 영상의 문법
화자가 가장 많이 쓰는 문형을 영상 속 실제 표현과 함께 정리했습니다.
| 문형 | 영상 속 표현 |
|---|---|
| 수동태 be + 과거분사 — 누가 하는지보다 무슨 일이 일어나는지에 초점 | is generated |
| 관계절 who / which + 절 — 사람이나 사물에 대한 추가 정보 | Random, which is |
Pronunciation to watch
- Long words — get the stress right: generator /ˈdʒɛnəɹeɪtə(ɹ)/, predictable /pɹəˈdɪktəbləl/, repeatable /ɹɪˈpiːtəbəl/, initialize /ɪˈnɪʃəlaɪz/, predictability /pɹəˌdɪktəˈbɪlɪti/
How to practise with this video
- Listen to the whole video once without speaking and note the words you do not know.
- Shadow it sentence by sentence at normal speed, repeating each one until your rhythm matches the speaker.
- Record yourself and compare with the original, paying attention to words like generate, topic, depend.
쉐도잉이란? 영어 실력을 빠르게 키우는 과학적 방법
쉐도잉(Shadowing)은 원래 전문 통역사 훈련을 위해 개발된 언어 학습 기법으로, 다언어 학자인 Dr. Alexander Arguelles에 의해 대중화된 방법입니다. 핵심 원리는 간단하지만 매우 강력합니다: 원어민의 영어를 들으면서 1~2초의 짧은 지연으로 즉시 소리 내어 따라 말하는 것——마치 '그림자(shadow)'처럼 화자를 따라가는 것입니다. 문법 공부나 수동적인 청취와 달리, 쉐도잉은 뇌와 입 근육이 동시에 실시간으로 영어를 처리하고 재현하도록 훈련합니다. 연구에 따르면 이 방법은 발음 정확도, 억양, 리듬, 연음, 청취력, 말하기 유창성을 크게 향상시킵니다. IELTS 스피킹 준비와 자연스러운 영어 소통을 원하는 분들에게 특히 효과적입니다.