sit-up
释义
sit-
出现位置
初中-北师大版 · 北师大版八年级英语上册 · Unit 3 Lesson 7 Time to Exercise
例句（2 条）
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He does 100 sit-ups each day.
他每天做100个仰卧起坐。
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5swiss ball sit-up This is more challenging than a normal sit-up because the instability of the ball forces the core muscles to work harder.
5健身球仰卧起坐该动作比普通的仰卧起坐更具挑战性。因为健身球自身所具备的不稳定性迫使肌肉工作的压力加大。