Studying instead of watching TV will help you to get better exam results, while saving five yuan instead of buying an ice cream means you can buy a new book.

学习而不是看电视将帮助你获得更好的考试成绩，而节省五元钱而非买一个冰激凌意味着你可以买一本新书。

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Example: At the time of writing, a special promotion gives you a voucher to save $75 USD on an exam when you buy an approved certification study book.

例如，在撰写本文时，IBM 举办的 特价促销活动 会发放一些优惠券，只要您购买某本权威认证书籍，就可以为考试节省 $75 美元。

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I have an exam next week; I must hit the book now.

我下个周有一个考试，我现在必须的用功学习了。

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The book is peppered with quips, presumably to remind the reader that he is not studying for an exam but is supposed to be having fun.

ECONOMIST: Understanding the universe: Order of creation | The