The idea "happiness", to be sure, will not sit still for easy definition.

可以肯定的是，“幸福”这个概念很难定义。

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She could not sit still for a moment.

她一刻也坐不住了。

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Or, if you're a pediatrician with a really small patient who will not sit still, it's because the laws of quantum mechanics don't allow an object to have a definite position and momentum.

或者你是个儿科医生,而你的小病人却总也坐不住,这是因为量子力学,不允许物体同时具有确定的位置和动量

耶鲁公开课 - 基础物理课程节选

Disney is a cautious owner, but they do not sit still and just milk royalties.

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While he took time off, he could not sit still for too long.

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This generation is already learning differently in schools and they certainly will not sit still for boring PowerPoint presentations.

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