1、两次的英文：twice。

2、例句：Twice weekly I go swimming。每星期我去游泳两次。

At match point, she served a double fault.她在决胜点两次发球失误。

The time at which the two reductive divisions occur is not necessarilycoincident to the time of ovulation.两次减数分裂的时间不一定与排卵时间相一致。