mind做想法时是可数的，做心力,智力是不可数。
mind：
n.头脑;大脑;思考能力;智慧;思维方式;聪明人;富有才智的人；
v.对(某事)烦恼，苦恼，焦虑;介意;(请求允许或客气地请人做事)介意
If you should change your mind, do let me know.
假如你改变主意的话，一定要告诉我。
The mind needs exercise as well as the body.
大脑同身体一样需要锻炼。
Many external influences can affect your state of mind.
许多外在因素都可能影响人的心情。
There is no chance that he will change his mind.
他不可能改变主意。
温馨提示：
