单元

In a sentence

• 这个小区有很多单元，每个单元都有不同的布局。

  This neighborhood has many units, each with a different layout.

  Here, '单元' refers to a unit within a residential building, commonly understood as sections or blocks of the building.

• 今天数学课我们学习了代数的一个单元。

  Today in the math class, we studied an algebra unit.

  In this context, '单元' is associated with an academic or syllabus-related segment, referring to a subsection of study or topic.

• 在编程里，函数可以被看作是代码的基本单元。

  In programming, functions can be considered as the basic units of code.

  Here, '单元' denotes a unit or constituent part of a larger context, in this case referring to programming structures.