An indefinitely large section of land; a country or district.

地带；区域；地方；地区。

A division or part of the body.

(身体之)部位。

Any sphere or realm.

范围；领域。

One of the portions into which the sea or air is thought of as divided, as according to its flora and fauna.

层(根据植物相和动物区系，划分大气或海水的层次)。

An open connected set together with none, some, or all of the points on its boundary.

【数】区域(一种开连通集，以及在其边界上的任何点)。