Some children undergo a complete transformation when they become teenagers.

一些儿童进入少年期会完全变成另一个人。

《牛津词典》

Did they become heroes?

他们成为英雄了吗？

youdao

They become elastic like rubber bands.

它们变得像橡皮筋一样有弹性。

youdao

If they become infected, especially after the first three months of pregnancy, they can get very sick or even die.

VOA: special.2009.08.05

That's why people are so excited about embryonic stem cells because in nature they become all the cells of the body.

这就是为什么胚胎干细胞如此让人激动,因为它的天然功能就是变成所有身体细胞

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This hasn't really been studied but my guess is they become worse and worse for the reason I mentioned before.

原因还没有研究 但我猜测,导致人们的估测越来越遭的原因我提起过

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

The closer you look at any particular set of numbers, the fuzzier they become.

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Now, instead of remaining a troublesome expense item, they become an increasingly valuable asset.

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For adults, the focus is on tetanus, and flu vaccines, when they become available.

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