unit的基本意思是“单位”,可指“工作单位”,也可指“计量或计数用的单位”“部件,元件,装置”“课本中的单元”等。

The family is the basic unit of society.家庭是社会之中的基本小单元。
She was discharged from the intensive care unit last week and transferred to a general ward.上星期她由特别护理病房转到普通病房。
Most of the units were cited according to their merits.按照功劳的大小,大多数单位都受到了表扬。
Then he sent a unit to surround Longli southeast of Guiyang.于是他派遣了一支部队去围住贵阳东南的龙里。
The metre is a unit of length.米是长度单位。
A ton is a unit of weight.吨是重量单位。
All the units employ hollow burned-clay blocks as the basic raw material.所有构件都用空心陶土砖做基本原料。
A Reading Practice section is added to each unit in Book Two.在第二册书里每个单元都加上了阅读练习部分。
They are not yet a unit on the question.他们在这个问题上意见不一致。

［同义词］   group, item, section, whole