many difference可数吗

　　例句：

　　Many years ago my father made a small difference in his village.

　　许多年前，我父亲在他的村子里做了一个小小的改变。

　　Michael: Many people talk about the difference at my office.

　　迈克尔：在我的办公室很多人谈这两者的区别。

　　But the difference in male and female employment rates in many countries is still large and persistent.

　　不过在许多国家，女性和男性的就业率差别依然巨大且有持续的态势。