effort精力可數嗎

This study represents a major expenditure of time and effort.

這項研究意味著要耗費大量的'時間和精力。

The work was done with the minimum amount of effort.

做這項工作沒費什麼勁。

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

他全力以赴以按時完成這項工作。

The project has demanded considerable investment of time and effort.

該專案已讓我們投入了相當多的時間和精力。

We need to make a concerted effort to finish on time.

我們需要通力合作才能按時完成。