The other three are water, methane and oxygen - and now oxygen is the only one left to be observed in the atmosphere of a planet outside the Solar System.
另外三个生命标志是水、甲烷和氧气，然而现在只有氧气还未在太阳系之外的行星中被发现。
A cooling system is inserted and the condensation of moisture is functioned from the atmosphere into surface water.
通过在石头底部嵌入一个冷缺系统，使得空气中的湿气经过冷却后在石头表面上凝结成水珠。
Agricultural pollution has a tridimension character of the complicated cycling system composed of water, soil, biosystem and atmosphere.
由于农业污染呈现水体、土地、 生物、大气的大循环体的立体污染的特点。
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