Because they had a speed close to that of light, they took thirty times longer to disintegrate than muons that just sit still in the laboratory.
因为它们有着与光速非常接近的速度，所以它们的衰变时间是实验室里静止的介子衰变时间的30倍。
When the particles crash into the Earth's atmosphere, they create showers of secondary particles called muons.
当粒子撞击地球大气层时，它们就会产生次生粒子(称为介子)簇射。
When the particles crash into the Earth's atmosphere, they create showers of secondary particles called muons.
当粒子撞击地球大气层时，它们就会产生次生粒子(称为介子)簇射。
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