directly:

adv. 直接地立即马上正好地坦率地

conj. 一…就

It is best for students to communicate directly with the teacher.

学生最好直接和老师沟通。

immediately:

adv. 立即，立刻直接地

conj. 一…就

You should stop this dangerous climbing game immediately.

你应该立刻停止这种危险的攀爬游戏。