be cool 一般常用的意思有两个。
1、装酷，扮酷
2、保持冷静
be的使用方法：be hard on 对某人苛刻 Don't be hard on them . be impressed on 使某人铭记某事 That lesson has been impressed on me .那教训我会永远记得. be based on 以.为根据.
be cool的例句如下：
When we meet the trouble we should be cool .遇到事情时，我们需要冷静对待。
Many people like be cool .许多人都喜欢装酷。
3、Being cool is very important for us.冷静对我们来说很重要。
4、He always be cool .他总是很酷。
5、Being cool is a good conduct .冷静是个很好的行为。
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