A demanding job or task requires a lot of your time, energy, or attention.
He tried to return to work, but found he could no longer cope with his demanding job.
他试图回去工作,但发现自己已经无力再应对他那份劳神费力的工作了。
People who are demanding are not easily satisfied or pleased.
Ricky was a very demanding child.
里基是个非常难伺候的孩子。