CNN student news
学习进度:1/743
once-in-a-lifetime
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千载难逢(的好机会) |
参考例句:
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- 1. Doing it once was just about excusable — doing it twice was certainly not. 这种事干一次也许还可以原谅,干两次就绝对不能了。
- 2. Mathematics was once dubbed the handmaiden of the sciences. 数学曾一度被视为各门科学的基础。
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