機警的用法和樣例：
例句
-
有些人在其他方面很機警，但在股票市場上卻容易上當受騙。
Some persons who are otherwise shrewd are mere babes in the woods where the stock market is concerned. -
我們的偵探都是非常機警的。
Our detectives were very much on the stick. -
有個機警的店員準確記得那個男子的穿著。
An observant shop assistant had remembered exactly what the man was wearing.
