If the rocket does not reach this speed, it will fall back to the earth.
如果达不到这个速度，火箭会落回地球。
These oxides are released into the atmosphere and they can fall back to earth as acid rain.
这些氧化物会被排进大气，然后会以酸雨的形式降回地面。
The pilot would then experience about a minute and a half of zero-G before the spacecraft begins to fall back to Earth.
然后在返回地球之前，飞船将进行一分半钟的零重力飞行试验。
Some of the ammonium, or NH4+, ions generated during subsequent reactions fall back to Earth in snow and are preserved in ice cores, where they linger as signs of the cataclysmic event.
一些在后来的反应中形成铵离子，通过下雪回到地球被保存在冰核中，成为发现这巨大事件的证据。
The airborne clots become cinders which fall back to earth to form cinder cones.
机载凝块成为灰烬的回落到地上，形成渣锥。
Presumably if all life on Earth were extinguished, the Earth's atmosphere would fall back to a persistent equilibrium, and become as boringly predictable as Mars and Venus.
可能要等地球上所有的生命都寂灭之后，地球的大气才会回降至持续平衡状态，变得像火星和金星那样沉闷可测。
The second theory is based on the fact today, the global warming but the irony is that global warming will not only make the earth warmer but will fall the earth back to ice age.
第二个理论是全球温度升高，具有讽刺意味的是这不仅导致地球变暖还会在未来把地球带回冰河时代。
The second theory is based on the fact today, the global warming but the irony is that global warming will not only make the earth warmer but will fall the earth back to ice age.
第二个理论是全球温度升高，具有讽刺意味的是这不仅导致地球变暖还会在未来把地球带回冰河时代。
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