三用英语怎么写

有三种尺寸——小号、中号和大号。

There are three sizes ─ small, medium and large.

这些医院的关闭是在三年期间逐步进行的。

Closure of the hospitals was phased over a three-year period.

有三人死于冻雾引起的连环车祸中。

Three people died in a multiple pile-up in freezing fog.

解决这个问题有三种根本不同的方法。

There are three essentially different ways of tackling the problem.

三个星期之后他才听到这个消息。

It was three weeks later that he heard the news.

三个月后决定终止治疗。

It was decided to discontinue the treatment after three months.