三用英語怎么寫

　　有三種尺寸——小號、中號和大號。

　　There are three sizes ─ small, medium and large.

　　這些醫院的關閉是在三年期間逐步進行的。

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

　　有三人死于凍霧引起的連環車禍中。

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

　　解決這個問題有三種根本不同的方法。

　　There are three essentially different ways of tackling the problem.

　　三個星期之后他才聽到這個消息。

　　It was three weeks later that he heard the news.

　　三個月后決定終止治療。

　　It was decided to discontinue the treatment after three months.