日球层就像一个盾牌，挡住了90%高能宇宙射线。 宇宙射线由高速带电粒子组成，会轰击星球并伤害生物。
The heliosphere shields the solar system from 90 percent of energetic cosmic rays — high-speed charged particles that would otherwise bombard the planets and harm life.
由于宇宙射线（来自太空的高能带电粒子）和土星冰冷的光环之间进行相互作用，土星上产生的反质子数量可能最多。
Saturn may produce the greatest number of antiprotons because of interactions between cosmic rays—energetic charged particles from space—and the planet's icy rings.
宇宙射线是太空中的高能粒子。
Cosmic rays are highly energetic particles that buzz around in space.
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