An assignment is a task or piece of work that you are given to do, especially as part of your job or studies. Assignment 的类型分为很多种，大到group work 的project，小到一二道数学题目。每个 assignment 都有老师想要考察同学对学科课程的理解与知识运用。上课不小心开了小差，可能这个知识点课后就怎么也想不通了。