Jack never wanted to stay in one place for very long, so they were always on the move.

杰克从不想在一个地方久留，所以他们总在辗转奔波。

《柯林斯英汉双解大词典》

At school I was always in trouble – my mind was never on my work.

上学时我一直麻烦不断–总也无法专注于我的功课。

《柯林斯英汉双解大词典》

Never had his age, with which, however, he was always grumbling, seemed so miserable as on this evening.

他老是抱怨自己的时代，却从来没有像今天晚上这样悲惨。

youdao

you never know. There's always a chance a string quartet may someday pop up on the schedule.

VOA: standard.2010.04.26

So, for example, hydrogen or fluorine they'll never be in the middle, they'll always be on the end of a molecule.

比如，氢或者氟,永远不会在中间，它们总是会在分子中最边缘的位置。

麻省理工公开课 - 化学原理课程节选

So, you already have a hint that methyl groups are never in the middle, they always have to be on the outside.

那么，你已经得到了一个提示,那就是甲基永远都不可能在中间，它们总是在外侧。

麻省理工公开课 - 化学原理课程节选

But the bickering over which base to close always drags on and never gets done right.

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He was always on a quick pace and never a procrastinator.

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