demanding

He tried to return to work, but found he could no longer cope with his demanding job.

他试图回去工作，但发现自己不再能适应这项费时的工作。

If we believe it's a finite resource, we act that way, we feel exhausted and need breaks between demanding mental tasks.

如果我们认为这是一种有限的资源，我们就会这样做，我们会感到疲惫，且需要在繁重的脑力劳动之间休息。

Ricky was a very demanding child.

里基是个非常苛求的孩子。

I see people pursuing higher-paying and increasingly demanding careers to accomplish this goal.

我看到人们为了实现这个目标而追求更高的薪水和要求越来越高的职业。

Employers are much more demanding than they used to be.

雇主的要求比以前高得多。