atmosphere 指围绕有的星球，特别是围绕地球的空气，即大气层。也可指环境气氛。
air 指空气，也泛指一般气体。
gas 指气态物，尤指供燃烧取暖或照明的气体，其中一部分称作瓦斯。
参考例句
1. She was badly gassed in the war. 她在战争中受到毒气的严重伤害。
2. Gas Station Proprietor: For what? 加油站经营者：为什么？
3. Air, gas or steam enters the separator at high velocity. 空气，气体或蒸汽以很高的速度进入分离器。
英英解释
n.
1. the state of matter distinguished from the solid and liquid states by: relatively low density and vi
2. a fluid in the gaseous state having neither independent shape nor volume and being able to expand in
3. a volatile flammable mixture of hydrocarbons (hexane and heptane and octane etc.) derived from petro
4. a state of excessive gas in the alimentary canal
5. a pedal that controls the throttle valve
6. a fossil fuel in the gaseous state; used for cooking and heating homes v.
1. attack with gas; subject to gas fumes
2. show off
网络释义
gas 气体;
胃泌素;
瓦斯;
汽油．也指体力。;
gas mark 焦痕;
烧焦;
气纹;
焦痕 本文章来自：博研联盟论坛;
Gas chromatography 气象色谱法;
气相层析;
气相层析，气相色谱法;
气相色层分析法;
