Even within a single field, conditions are always changing from one section to the next.

即便在同一个区域内，不同部分的情况也总是在变化。

youdao

He said it was wrong to single out any section of society for AIDS testing.

他说挑出社会任何一部份人做艾滋病检查都是错误的。

《柯林斯英汉双解大词典》

First, you design services that are common to all members of the product line, using the method described in the design section for single systems.

首先，你要使用针对单一系统的设计部分中描述的方法，设计产品线的所有成员共有的服务。

youdao

Friday's killings took place in two rooms within a single section of the school, police have said.

BBC: Connecticut school shooting: Obama calls for action

The government says work to dual the last single section of carriageway of the A11 through Norfolk and Suffolk will be finished in two years.

BBC: England

Restoration of No. 1 trains to South Ferry would leave just a single section of the subway system out of service because of storm damage, the A train between Howard Beach and Rockaway Park.

WSJ: Downtown, Old Stop on Subway to Reopen