defining unit造句

a partition is a user-defined unit of data organization
分区是用户定义的数据组织单元。
tasks are control flow elements that define units of work that are performed in a package control flow
任务是一些控制流元素，它定义包控制流中执行的工作单元。
the defined unit cells have the brick shape which height is equal to the braiding pitch, and oriented in the same reference coordinate as the composites
该单胞模型为一六面体形状，其取向平行于预制件的表面，且高为编织花节长。
It's difficult to find defining unit in a sentence. 用defining unit造句挺难的