双语例句原声例句
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总的来说，这是一本很有用的书。
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照片可以成为有用的教具。
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这无疑是我们迄今为止最有用的一次会议。
This meeting has been, without doubt, one of the most useful we have had so far.
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However, the thing to remember is, when you look at heats of reaction under those conditions it's all well and good.
相反，需要记住，当你需要知道反应中放出的热量时,这些量是很有用的。
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And it's a useful pattern when you want to express that your feelings have been hurt or that you're not liking something,
当你想表达你在情感上受到了伤害或者不喜欢某件事的时候，这是个很有用的句型。
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You can actually initialize multiple things at once by separating them with a comma, and this is sometimes helpful.
你可以一次性初始化很多东西,通过用逗号分开它们，这有时是有用的。
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