The table folds up when not in use.

这桌子不用时可以折叠起来。

《牛津词典》

Katy could think clearly when not under stress.

凯泰在没有精神压力时能够清晰地思考。

《柯林斯英汉双解大词典》

When not removed, plaque causes tooth decay and gum disease.

牙斑没有清除就会导致蛀牙和牙龈疾病。

《柯林斯英汉双解大词典》

When not on the slopes, Weibrecht takes classes at Dartmouth College and plans on eventually earning his Bachelor of Arts in earth science.

VOA: standard.2010.02.09

Rather, just about any normal child, even when not exposed to a full-fledged language, can create a language.

甚至,任何一个普通的小孩,即使并未接触过成熟的语言环境,也可以创造语言

耶鲁公开课 - 心理学导论课程节选

When to use "the" in a sentence, when not to use "the", when to use "an" instead of "a" or "a" instead of "the".

在一个句子中，什么时候用“the”，什么时候不用“the”，什么时候用“an”代替“a”，什么时候用“a”代替“the”。

经常犯的失误 - SpeakingMax英语口语达人

It is saying that, when not fully compatible, their interests do not count equally.

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When not being accosted by curious strangers, wearers can use the eyewear to break the ice.

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When not working with his publisher, he often hires outsiders to do his editing.

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