prerequisite|prerequisites

你必须先完成基础数学课程才能学习微积分。

Basic Math is a ___prerequisite for taking Calculus.

英语流利是申请这个国际项目的必备条件之一。

Fluent English is one of the ___prerequisites for applying to this international program.

良好的英语水平是申请这个项目的先决条件。

A good command of English is a ___prerequisite for applying to this program.