例句;
1、As you're aware, this is not a new problem.
正如你所了解的，这不是一个新问题。
2、The painting is not representative of his work of the period.
这幅画不是他在那个时期的'代表作。
3、 It is not within my power to help you.
我是爱莫能助啊。
4、It is not clear what they want us to do.
我们不肯定他们要我们做什么。
5、Her work is not up to standard.
她的工作不合格。