effort可数吗?

You should put more effort into your work.

你应该更加努力地工作。

This study represents a major expenditure of time and effort.

这项研究意味着要耗费大量的时间和精力。

The work was done with the minimum amount of effort.

做这项工作没费什么劲。

He made a concentrated effort to finish the work on time.

他全力以赴以按时完成这项工作。

The project has demanded considerable investment of time and effort.

该项目已让我们投入了相当多的时间和精力。