这些微粒没有到达大气的最高层，并且不可能长时期悬浮在空气中而影响全球气候。
Those particles haven't reached the upper levels of the atmosphere and are unlikely to hang around for a long time or affect the global climate.
（在大气最高层） 有些空气微粒， 特别是较轻气体的原子， 运动足够快， 以至能从空气海洋 （大 气圈）中逃逸出来。
Some of the air particles, particularly the atoms of the lighter gases, travel fast enough to escape from the air ocean.
来自太阳的紫外线把氧分子分解成原子，成为了大气最高层(电离层)的主要成份。
Ultraviolet rays from the sun decomposed into atomic oxygen molecules into the atmosphere at the highest level (the ionosphere) the main ingredients.
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