with与about的用法区别

There was much discussion about the reasons for the failure.

就失败的`原因进行了大量的讨论。

She moves with the natural grace of a ballerina.

她的动作具有芭蕾舞演员自然优雅的丰姿。

There are still a few residual problems with the computer program.

电脑程序还有一些残留问题。

It was a difficult situation, when you think about it.

仔细想来，当时处境是很困难的。

The population is increasing at about 6% per year.

人口以每年约6%的速度增加。