Mathematics is an obligatory course at our school.

数学是我们学校的必修课。

This obligatory course is open to all freshmen.

这门必修课对所有新生开放。

English is an obligatory course in many universities.

英语是许多大学的必修课。

Introduction to Comparative Literature is an obligatory course intended for the first year graduate students of British and American Literature.

“比较文学导论”是面向英语语言文学专业硕士研究生开设的一门必修课。