mind做名词可数吗

　　例句：

　　Would you mind leaving us alone for a few minutes?

　　你不介意让我们单独待一会吧？

　　The mind needs exercise as well as the body.

　　大脑同身体一样需要锻炼。

　　Two keen minds that they are, they took to each other.

　　两个聪明人，惺惺惜惜。