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。
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。
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.
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