Methane is a kind of hothouse effect gss being able to destroying ozonosphere. The damages caused by its leakage to atmospheric envelope are followed with interest by every country over the world.
甲烷是一种对臭氧层有破坏作用的温室效应气体，它的泄漏排放对大气环境的影响已引起世界各国的关注。
The outer envelope of all four sections contains air maintained at atmospheric pressure.
四部分的外层封皮充满空气用来保持与大气的压力相协调。
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