There have been many changes in recent years.
近几年发生了许多变化。
Call me if you have any problems regarding your work.
你如果还有什么工作方面的问题就给我打电话。
You seem to have set a new trend.
看来你们是开了一个新风气。
No new SARS cases have been reported in the region.
该区没有新增非典型肺炎病例。
These changes have occurred over a long time span.
这些变化经过了很长一段时间才形成。