单词：quads
n. a muscle of the thigh that extends the leg
n. (printing) a block of type without a raised letter; used for spacing between words or sentences
quads的用法和样例：
例句
- This works the quads and the hamstrings.这组动作锻炼四头肌和腿筋。
- Contract your quads by gently pressing your thighbones down into the floor.通过轻轻地将大腿骨压向地面来收缩股四头肌。
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