| 例句 |
He blotted his driving record by having an accident.他因发生一次事故而在驾驶记录上留下污点。Up to now, ozone losses have tended to follow a two-year cycle.截至目前，臭氧层破坏往往每两年发生一次。They blamed their leaders for each and every disaster.每发生一次灾祸他们都责怪他们的领导人。It happens fortnightly.这种事每两个星期发生一次。They predicted a severe economic downturn.他们预测将发生一次严重的经济衰退。Risk of exposure to HIV increases with each casual encounter.每发生一次随意的性行为，感染艾滋病病毒的危险就增加一些。The people will never consent to another war.人民决不会同意再发生一次战争。This is the second time he's been sent home from school this month, so woe betide him if it happens again!这是他本月内第二次被从学校赶回了家，要是再发生一次这样的事，他就要倒霉了。 |