effort可数吗?
effort既可做可数名词也是不可数名词，做可数名词,表示“费神的事,困难的事,成果”的意思；
作不可数名词,表示“努力”的意思。
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。