mind做名詞可數嗎

例句：

Would you mind leaving us alone for a few minutes?

你不介意讓我們單獨待一會吧？

The mind needs exercise as well as the body.

大腦同身體一樣需要鍛鍊。

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

兩個聰明人，惺惺惜惜。