极光是由地球大气上层的气体分子与来自太阳的高能带电粒子相互作用产生的。
Aurorae are caused by the interaction between energetic charged particles from the sun and gas molecules in the upper atmosphere of the Earth.
干燥，低温碳化和气体打击发生在上层，而永久气化木炭在较低的地带占地。
Drying, low-temperature carbonisation, and cracking of gases occur in the upper zone, while permanent gasification of charcoal takes in lower zone.
译文：来自太阳的大部分能量都不会到达地球的表面，这种能量或者被上层大气中的气体反射或吸收。
Much of the energy that comes from the Sun never reaches the Earth's surface. It is either reflected or absorbed by the gases in the upper atmosphere.
支持可在上层模具，机械手臂，或气体执导普遍向上方向降低的压力。
Support may be provided by a reduced pressure within an upper mould, a mechanical arm, or gas directed in a generally upwards direction.
支持可在上层模具，机械手臂，或气体执导普遍向上方向降低的压力。
Support may be provided by a reduced pressure within an upper mould, a mechanical arm, or gas directed in a generally upwards direction.
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