Feel anxious or troubled; fret.

感到焦虑或不安；担心。

Cause someone to feel anxious or concerned.

使某人感到焦虑或不安；使担心。

A feeling of anxiety or concern.

焦虑或担忧的感觉。

Something or someone that causes anxiety.

引起担忧的事物或人。

Of an animal: bite and shake repeatedly.

指动物反复咬住并摇晃。

Keep nervously touching or fiddling with something.

因紧张而反复摆弄或触碰某物。