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。
We need to make a concerted effort to finish on time.
我们需要通力合作才能按时完成。