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。