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.
做這項工作沒費什么勁。
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.
該項目已讓我們投入了相當(dāng)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。