military units
business units
cost per unit
teaching units
storage units
A: How many units are in this textbook?
A：这本教科书里有多少个单元？
B: It has twelve units in total.
B：它总共有12个单元。
1) 测量、计数的单位
2) 组成整体的各个部分或单元
3) 组织或团体中的成员或小组
1. 单元；单位；部件
noun
1. An individual part of something, especially a building or a machine, or a group of people.
Synonym: elements, components, parts