[自然題]在銀河系中,大約有多少顆星星
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tvb now,tvbnow,bttvb K' e4 [; ^1 ?) e- s7 n6 Y, H
tvb now,tvbnow,bttvb0 y$ W0 O: x: C
tvb now,tvbnow,bttvb0 z: Z6 l) u' R7 L" f( E
按Ctrl + A 看答案...tvb now,tvbnow,bttvb9 W+ c/ |: p* p+ _1 J
[答案]約一千億顆 |