regions
A region is a large area of land that is different from other areas of land, for example because it is one of the different parts of a country with its own customs and characteristics, or because it has a particular geographical feature.
Barcelona, capital of the autonomous region of Catalonia.
巴塞罗那,加泰罗尼亚自治区的首府。
a remote mountain region.
一个遥远的山区。
in the region of
You say in the region of to indicate that an amount that you are stating is approximate.
The plan will cost in the region of six million dollars.
这项计划将花费大约六百万美元。