某事

To be obliged to do sth.

不得已而做某事

Be occupied in doing/ with sth.

忙于做某事

Be occupied in doing sth.

忙于做某事

It is your turn to be on duty.

轮到某人做某事了。

To be responsible to sb for sth.

向某人对某事负责。

Be responsible to sb. for sth.

为某事对某人负责 475。

Be scheduled to do something.

计划干某事

Be seized with a sudden impulse to do sth.

突然心血来潮想做某事

Be set on doing sth.

决心做某事

Suppose ,be supposed to do sth.

被认为应该做某事，往往没有完成

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。