双语例句原声例句权威例句
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A clearly quantifiable measure of quality is not necessary.
一种确切的可计量的质量检测是不必要的。
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They throw away all the less-used things, or some things that are not necessary.
他们扔掉所有不常用，或一些不必要的东西。
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It is not necessary to enroll before the course starts.
不需要在课程开始前注册。
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He said the first great fact was that laws were not necessary to keep slavery out of California and New Mexico.
VOA: special.2009.03.19
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It's not necessary to do that, but it can be quite convenient.
虽然没有必要这样做，但是这样做是很方便的。
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It's not necessary very well formatted but it looks pretty complex, right?
排版不是很整齐,看起来也非常复杂，不是吗？
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