be not good at后面加什么

This would be welcome, for things are not so good at home.

能这样大家会拍手称快，毕竟国内的'情况没那么好。

He be not very good at description.

他不太擅长描写。

To be good at writing requirements you must understand not the operating system but the operator.

为写出好的需求，你要理解的是操作人员而不是操作系统。