Why get upset just because you got one bad grade?
何必因为一次成绩不好就想不开呢？
You will always have the bad as well as the good in the world.
人生在世总是有苦有甜。
I thought it was a very bad article.
我以为那是一篇很低劣的文章。
The building is in a bad state of repair.
那座房子年久失修。
This kind of behaviour gives students a bad name.
这种行为使学生们背上骂名。