You go to Church this Sunday, two earth days from now. I use 宇宙 days. I go to church in 2 宇宙 days.
No, not me, you use 地球作为参照系
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在已知的可见的宇宙范围内。而这个范围,如果用光年表示,就等于460亿光年。看里面的链接。
-蓝山雀-
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09/25/2015 postreply
11:54:46
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You are avoiding my question.
-Calypso-
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09/25/2015 postreply
12:01:51
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光速运行一年的距离,叫光年。光年是距离的单位。
-蓝山雀-
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09/25/2015 postreply
12:05:10
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I am asking you the definition of a day. Not 光年
-Calypso-
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09/25/2015 postreply
12:07:26
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光年是距离,你问的是时间,这是跑题了。
-蓝山雀-
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09/26/2015 postreply
00:54:59
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How does 460亿光年 related to 7 days?
-Calypso-
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09/25/2015 postreply
12:05:21