4.2光年是多少米?
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4.2光年是多少米?4.2光年是多少米?4.2光年是多少米?光4.2年走的距离,光速是3*100000000m/s4.2*365*24*60*60*3*100000000m=3973536000000
4.2光年是多少米?
4.2光年是多少米?
4.2光年是多少米?
光4.2年走的距离,光速是3*100000000m/s
4.2*365*24*60*60*3*100000000m=39735360000000000m