前者是名词，后者是动词，例如：

1、We expect to see further improvement over the coming year.我们期望来年会有更进一步的改善。

2、Is this situation not susceptible of improvement by legislation?这种状况有无可能通过立法加以改善

3、We seek to improve relations between our two countries.我们寻求改进我们两国间的关系。