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1·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。《柯林斯英汉双解大词典》

2·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。

3·It is not necessary to enroll before the course starts.

不需要在课程开始前注册。

4·Hospital admission is not necessary in most cases.

大多数情况下，病人无须住院。《牛津词典》

5·Pictures are not necessary but stories with creative pictures will get extra points.

图片不是必需的，但带有创意图片的故事将获得额外的加分。

6·It's not necessary to find a friend who is the same as you.

没有必要找一个和你一样的朋友。

7·After she knew whole story, she told her son that it was not necessary to be too hard on himself and winning or losing was only half the game.

当她知道了整个故事后，她告诉儿子，没有必要对自己太苛刻，输赢只是比赛的一半。

8·It is not necessary to set down the rest of the oration.

没有必要把这篇演说的其余部分写下来。

9·Lunch containers were not necessary for school kids in cities.

午餐盒对于以前在城里上学的孩子来说并非必需品。

10·It is not necessary to establish yourself as top dog or leader of the pack by using extreme measure.

没有必要用极端手段来确立自己领头羊或群体领导人的身份。