Feeding, courtship, reproduction, and even "rest" are carried out while in constant motion.

进食、求偶、繁殖，甚至“休息”，都是在不断运动中进行的。

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Not only the planets but also the sun is in constant motion.

不仅是行星而且太阳也在不断地运动。

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And sharks have an added burden: they sink when they stop swimming, so they must be in constant motion.

对鲨鱼来说，还有别的负担：它们停止游动时就会下沉，所以它们必须不停地游动。

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We are bodies in constant motion.

我们处在不停的运动之中。

耶鲁公开课 - 政治哲学导论课程节选

Is the other party in constant motion, in fact, never quite coming to rest during the conversation?

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Leo did everything quickly, and when I went to the park with him, I was in constant motion, too.

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On the map of modern Britain, with giant supermarkets and depots joined up by motorways, his lorries were like bright ants in constant motion between them.

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