outer
单词辨析：
只作定语，指距离中心、内部较远的，或相对而言在外的。
He saw her to the outer door.
他把她送到外边门口。
I heard a voice in the outer room.
我听到外屋有人说话。
指某事物或人体外部的。
the external appearance of the church
教堂的外观
The external layer of the skin is relatively impermeable to water.
皮肤的外层相对来说不透水。
只作定语，指人或事物的外表的，但有时并非真实。
An outward show of confidence concealed her nervousness.
她表现出很有信心的样子以掩盖内心的紧张。
These houses look the same in outward view.
这些房子从外观上看是相同的。
相关例句：
He heard a voice in the outer room.
他听到外屋有人说话。
On going through the outer gates to his lord's court, he drew himself in, as though the entrance were too small.
入公门，鞠躬如也，如不容。（《论语》）
The outer region of the Earth's atmosphere; contains a high concentration of free electrons.
地球大气层的一个区域；包含了高度密集的自由电子。
There is room for infill between the new outer suburbs.
在新建的远郊住宅区之间还有空地可以盖房。
Our army had a life-and-death fight with the enemy at the outer walls of the city.
我军在外城和敌人展开了殊死搏斗。
To this end, China stands for the complete prohibition and thorough destruction of weapons deployed in outer space.
为此，中国主张全面禁止和彻底销毁外空武器。