他们必须达到一定水准专业水平。

They must reach a certain level of professional standards.

youdao

你达到了一定地水平，而你却得不到更多。

You reach a certain point when you can't take any more.

youdao

你达到了一定地水平，而你却得不到更多。

You reach a certain point when you can't take any more.

youdao