Researchers always knew that meteoroids often blew up before they reach the Earth's surface, but they did not know why.
这些酸性物质正逐渐到达地球表面,它们会对一切事物造成危害,包括植物、建筑物和人类。
These acidic materials are gradually reaching the surface of the earth which can cause harm to everything, plants, buildings, and human beings.
研究人员知道,流星体在到达地球表面之前往往会爆炸,但他们不知道为什么。
Scientists long knew that meteoroids often blew up before they reach the Earth's surface, but they didn't know why.
直到1980'年代,研究人员还只能估计有多少紫外线到达地球表面。
Until the 1980s, researchers could only estimate how much ultraviolet radiation reaches Earth's surface.
虽然卫星的大部分都会在大气层中烧毁,但仍有一些碎片可能会到达地球表面。
While most of the satellite will disintegrate in the atmosphere, Some smaller parts are expected to reach Earth's surface.
太阳风具有高放射性,具有致命性危险,但是地球的磁层中和或排斥太阳风,阻止它到达地球表面。
Solar wind is highly radioactive and deadly to life, but the Earth's magnetosphere neutralizes or repels solar wind, preventing it from reaching Earth's surface.
是的,”教授回答说,盯着我的眼镜说:“我没有看到任何其他方式到达地球表面。
Yes,” replied the Professor, eyeing me over his spectacles,“I don't see any other way of reaching the surface of the earth.”.
由于臭氧吸收紫外线辐射,较少的臭氧意味着较多的太阳紫外线会到达地球表面。
Because ozone absorbs UV radiation, less ozone means that more UV rays from the sun would reach Earth's surface….
经计算机模型推算,平流层的烟尘罩将阻挡7-10%到达地球表面的温暖阳光。
The computer models estimated this smoke layer would block 7- 10% of warming sunlight from reaching the surface of the Earth.
因此,它们不会到达地球表面。
Because of that, they should not be able to reach the surface of the Earth.
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