1、兩次的英文：twice。
2、例句：Twice weekly I go swimming。每星期我去游泳兩次。
At match point, she served a double fault.她在決勝點(diǎn)兩次發(fā)球失誤。
The time at which the two reductive divisions occur is not necessarilycoincident to the time of ovulation.兩次減數(shù)分裂的時(shí)間不一定與排卵時(shí)間相一致。
