unit terms

例句：

1. 1. The engineer used unit terms to describe the size of the machine parts.
   工程师使用单位术语来描述机器零件的大小。
2. 2.In this case, we need to use unit terms to express the relationship between two variables.
   在这种情况下，我们需要使用单位术语来表达两个变量之间的关系。
3. 3. The teacher explained the unit terms in a way that was easy for students to understand.
   老师以学生容易理解的方式解释了单位术语。