... to break the back of sth:完成…最困难的部分 flat on your back:丧失能力;(尤指)卧病在床 to get sb's back up;to put sb's back up:使某人烦恼 ...
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How to do it: lie flat on your back with one arm outstretched perpendicular to your body.
如何做:仰面平躺,单臂平伸并与身体垂直。
Rotational stretch. Lie flat on your back. Bring one leg up to a 90-degree angle and hold.
转动伸展。背部着地平躺,一条腿向上升呈90度,保持住。
How it works: Lie flat on your back. Hold the book above your head and read until your arms are sore.
怎么做:平躺下,仰卧。把书举到头部上方看,直到胳膊酸痛。
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