outer

外太空

Refers to the region beyond the Earth's atmosphere.

指地球大气层以外的区域。

外表面

The external side or face of an object.

The outermost stratum or coating of something.

The furthest point or limit of something.

外壳

The hard protective outer case of something.

某物的坚硬保护性外壳。

外衣

Garments worn over other clothes, especially outdoors.

穿在其他衣服外面的衣物，尤指在户外穿着。

Garments worn over other clothes, especially outdoors.

外皮

The external covering, especially of a fruit, an animal, or a structure.

外部的覆盖物，尤指水果、动物或建筑物的表皮。

The furthest boundary or extent of something.

外部世界

Refers to the world outside of one's own country, community, or personal experience.

指个人国家、社区或个人经历之外的世界。

A layer of a substance spread over a surface for protection or decoration.

An item of clothing worn over other clothes.

外部边界

The continuous line forming the boundary of a closed geometric figure.

一个区域的外边界

The outer or less important part of an area, group, or activity.