该课程不需要西班牙语的先验知识。

The course requires no ___prior knowledge of Spanish.

参考我们之前的通信，我接受您再次担任翻译的提议。

Referring to our ___prior correspondence, I accept your offer to be your interpreter again.

你需要获得这个项目的预先批准。

You need to obtain ___prior approval for this project.