As the comet nears the sun, its ice melts, releasing gas and dust that stream away into space.
当彗星靠近太阳时，它的冰层融化，释放的气体和尘埃飘向太空。
As the comet nears the sun, its ice melts, releasing gas and dust that stream away into space. (Explore an asteroids and comets interactive.)
当彗星靠近太阳时，它的冰层融化，释放的气体和尘埃远远地飘向太空。(探索一颗小行星和彗星们的相互作用。)
This is because as the ice sheet melts, its surface will be at ever lower altitudes, where the air will be progressively warmer, even if global warming ceases.
这是因为，随着冰盖融化，其表面高度将越来越低，即使全球变暖停止，那里的空气也会逐渐变暖。
This is because as the ice sheet melts, its surface will be at ever lower altitudes, where the air will be progressively warmer, even if global warming ceases.
这是因为，随着冰盖融化，其表面高度将越来越低，即使全球变暖停止，那里的空气也会逐渐变暖。
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