数字几十几用英语怎么表达

　　例句：

　　Fifty-two percent were unsure about the idea.

　　52%的人对这个想法都没有把握。

　　In fifty-two years of working he had one week of sickness.

　　他在52年的工作时间里曾生过1星期的病。

　　One child a week is fifty-two a year.

　　每星期一个孩子相等于一年五十二个。

　　He is fifty-two, but doesn't look it.

　　他看上去不像五十二岁的人。