40一50的英文怎么写

　　例句：

　　Fifty is the new forty。

　　四十尚未老，五十正当年。

　　You can't live on forty pounds a week。

　　你靠每周四十英镑没法过活。

　　He told us that her age was forty—eight or thereabouts。

　　他告诉我们她的年龄在四十八岁左右。

　　They would have been married forty years come this June。

　　到今年六月他们结婚就有四十年了。