来自外太空的各种宇宙射线通过空气进入大气层，但来自太阳的大量辐射却被屏蔽了。
Cosmic rays of various kinds come through the air from outer space, but enormous quantities of radiation from the sun are screened off.
离子是存在于大气层中的电荷，它们存在于我们所呼吸的空气中。
Ions are electric charges that exist in the atmosphere, in the air that we breathe.
随着那些宇宙粒子进入大气层，并且和空气，水，岩石或别的什么阻挡在他们飞行路径上的东西中的原子碰撞，它们就会触发其他粒子的级联反应。
As cosmic particles enter the atmosphere and bump into atoms of air, water, ice, rock or anything else that happens to stand in their way, they trigger telltale cascades of other particles.
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