I insist to do sit-ups every night.
我每晚都坚持做仰卧起坐。
She used to do sit-ups before sleep, but not now.
她过去睡觉前常做仰卧起坐，但现在不做了。
Would you ever consider sticking to a plan to do ten sit-ups a day?
有想过坚持每天做十个仰卧起坐吗？
Guys do sit-ups a lot to impress the ladies in the gym.
在体育馆里，男的（喜欢）做很多仰卧起坐，以给女士们留下深刻的印像。
Guys do sit-ups a lot to impress the ladies in the gym.
在体育馆里，男的（喜欢）做很多仰卧起坐，以给女士们留下深刻的印像。
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