Outside the lab, he says, most people are unlikely to hold a warm-up stretch for longer than about 30 seconds.

他说，出了实验室，大多数人做热身拉伸运动不会超过30秒。

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A few times throughout the day stand up stretch out your arms, your back, your legs, and your neck.

一天当中，找一小块时间站起来，伸伸胳膊，直直背，抖抖腿或动动脖子。

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Let's do warm up and stretch exercises.

让我们一起做热身和伸展运动吧。

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Some of these books which we think are roughly from a certain date, they will contain narrative snippets or legal materials or oral traditions that may even date back or stretch back further in time, and they were perhaps transmitted orally and then ended up in these written forms.

有些篇章只是被我们粗略地认为出现于那个年代，其中包含的故事片段或律法材料或口头传统,其实也许能够追溯到更久远，所以这些很可能一开始是被口头传播,后来才用文字形式记载的。

耶鲁公开课 - 旧约导论课程节选

"We need more catch-up and stretch - particularly in literacy and numeracy, " says the education secretary.

BBC: NEWS | UK | Education | Struggling pupils get extra help

When Mr Gayford gets up to stretch, he takes a peek at the painting.

ECONOMIST: The view of a man who sat for him

But even when the workers get up to stretch their legs they take their laptop with them.

BBC: A targeted message from Obama 2012