他把动作重复了几次。
坐下来让肩膀向后转，收下巴，同样动作重复做大约10次。
Sit back down and circle your shoulders backward, with your chin tucked, about 10 times.
3 - 5的动作重复2 - 4次——尝试这六个技巧，让你的身体锻炼得最充分。
Do 2 to 4 sets of 3 to 5 repetitions each. (Try these six tricks to get the most out of your workout.)
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