He is well versed in different methodologies and knows how and when to apply them.

他精通不同的方法学，并且知道怎样以及何时需要使用它们。

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Of course, knowing when to apply such clever features is the crux of the matter, and all of us struggle with it from time to time.

当然，知道什么时候应用这么聪明的特性是问题的关键，而我们都在不断地为之努力。

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You may be able to keep all the knowledge in your head, but knowing when to apply which rules is the mark of a true professional.

也许你可以把书本上的一切知识都装入脑中，但知道在何时应用何种规则，这才是真正高手的标志。

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But when they apply for federal funds for social programs, we expect them to run their programs according to the Constitutional principle.

担当它们申请获得联邦基金施行其社会项目时，我们期望它们根据,宪法的原则推行那些项目。

普林斯顿公开课 - 人性课程节选

If you look at the history of engines there are discrete advances when people were able to apply the theory more and more.

如果你去回顾一下引擎的发展史,就会发现在这进程中的取得的各种突破,都源于对理论更加充分的应用

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Why,when dealing with harmony and bass lines, do I want to start by focusing on popular music and then apply those principles to classical music?

为什么在处理和音和低音线时，我是否需要注重流行音乐然后将这些原则应用到古典乐上？

耶鲁公开课 - 聆听音乐课程节选

So we've got about as difficult a economic play as is possible, which is to press the accelerator, in terms of job growth, but then know when to apply the brakes in the out-years, and do that credibly.

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But giving effect to that document does not mean picking and choosing when and where to apply it simply because it does not always suit the desires of a United States Senator.

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The rules never came, adding to the general chaos and confusion when the time arrived to apply them.

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