Flexible use of ancient poems. 1. Seeing that some students don't study hard and waste time, you can persuade them with ancient poems:&; (=NationalBureauofStandards) ...

1. Young people who don't work hard are pathetic.

This is from the same root. Why are you in such a hurry to fire each other?

It's too shallow from the paper to know how to do it.

4. There is no way to recover from the heavy mountains and heavy waters, and there is another village.

(The answer is not unique)