部门是一个大机构里面的小组，比如公司或者政府里管不同工作的地方。

A 部门 is a small group within a large organization, such as a company or government office that manages different tasks.

每个部门都有自己的工作，人们常常说自己在哪个部门上班。

Each 部门 has its own work, and people often say which 部门 they work in.