change是可数名词吗

　　例句：

　　What we need now is a change of focus.

　　我们现在需要的是改变对事物的看法。

　　There's still time to change your mind.

　　你还有时间改变主意。

　　A change of job would do you the world of good.

　　换一下工作会对你大有好处。

　　I made only a few small changes to the report.

　　我对报告只做了几处小改动。

　　There are bound to be changes when the new system is introduced.

　　引进新系统后一定会发生变化。