跟读练习: Seven Testing Principles: Software Testing - 通过视频学习英语口语
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Consider a scenario where you are moving a file from folder A to folder B.
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Think of all the possible ways you can test this.
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Pause the tutorial and think over the exercise.
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Apart from the usual scenarios, you can also test the following conditions.
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trying to move the file when it is open.
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You do not have the security rights to paste the file in folder B.
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Folder B is on a shared drive and storage capacity is full.
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Folder B already has a file with the same name.
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In fact, the list is endless.
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Or suppose you have 15 input fields to test, each having 5 possible values.
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The number of combinations to be tested would be 5 raised to 15.
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If you were to test all the possible combinations, project execution time and costs will rise exponentially.
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Hence, one of the testing principles states that exhaustive testing is not possible.
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Instead, we need the optimal amount of testing based on the risk assessment of the application.
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And the million dollar question is, how do you determine this risk?
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To answer this, let's do an exercise.
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In your opinion, which operation is most likely to cause your operating system to fail?
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I'm sure most of you would have guessed opening 10 heavy graphics applications all at the same time.
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So if you were testing this operating system, you would realize that defects are likely to be found in a multitasking module, and that needs to be tested thoroughly.
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Which brings us to our next principle, Defect Clustering, which states that a small number of modules contain most of the defects detected.
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With experience you can identify such risky modules.
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But this approach has its own problems.
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If the same tests are repeated over and over again, eventually the same test cases will no longer find new bugs.
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This is another principle of testing called pesticide paradox.
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To overcome this, the test cases need to be regularly reviewed and revised, adding new and different test cases to help find more defects.
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But even after all this sweat and hard work in testing, you can never claim your product is bug-free.
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To drive home this point, let's see this video of the public launch of Windows 98.
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Let's plug it in.
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It's going to say, hey, I see you plugged in a new device, and it's going to load in the appropriate drivers.
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You'll notice that this scanner build Whoa.
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Moving right along.
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That must be why we're not shipping Windows 98 yet.
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You would think a company like Microsoft would have tested their OS thoroughly
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and would not risk their reputation just to see their OS crashing during its public launch.
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Hence, the testing principle states that testing shows the presence of defects.
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Testing reduces the probability of undiscovered defects remaining in the software.
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But even if no defects are found, it is not a proof of correctness or a proof that no defects remain in the system.
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But what if you work extra hard, taking all precaution and making sure your software product is 99% bug-free
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and the software does not meet the needs and requirements of the client?
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Which leads us to our next principle, which states that absence of error is a fallacy.
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Finding and fixing defects does not help if the system build is unusable and does not fulfill the user's needs and requirements.
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To fix this problem, the next principle of testing, early testing, states that testing should start as early as possible in the software development lifecycle,
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so that any defects in the requirements or design phase are captured as well.
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We'll have more on this principle in a later tutorial.
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And the last principle of testing states that the testing is context dependent, which basically means
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that the way you test an e-commerce site will be different from the way you test a commercial off-the-shelf application.
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Before we close this tutorial, here's a quick recap of the seven testing principles.
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這個影片適合誰？
無論你是想提升「英語影子跟读」技巧的初學者，還是想通過「看YouTube學英語」練習口語的中級學員，這部講解軟件測試原則的影片都很合適。它的對話邏輯清晰，用詞貼近日常，既能學到專業術語，又能鍛煉「英语口语练习」中的連貫表達，非常適合當作shadowing素材。
值得學的詞彙和短語
- exhaustive testing：徹底測試。影片中提到「窮盡測試不可能實現」，這個短語常用於技術場景。
- Pesticide Paradox：農藥悖論。指重複測試會導致測試用例失效，類比有趣，容易記憶。
- drive home this point：強調這一點。口語中用來加強論述，比如「用例子來drive home this point」。
如何練好口音？
這位講者的發音清晰，語速中等，很適合shadowing。練習時注意以下兩點：一是重讀關鍵詞，比如「defects」「risk assessment」等專業詞彙要讀得稍重，突出語義重點；二是模仿語調起伏，講者在解釋複雜概念時（如「5的15次方組合」）會輕微升調，表達疑問或強調時降調，跟讀時要貼合這種節奏。建議打開影片，逐句進行「影子跟读」，反覆練習直到語速和語調接近原聲，這對提升口語流暢度幫助很大。
想找更多適合的shadowing site？不妨從這類知識型YouTube影片入手，既能學英語，又能長見識，一舉兩得！
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。