加载中…相对论的时间内涵
(2022-08-23 17:30:19)
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分类： 文化，教育，情感 |
相对论的时间内涵
胡良
双生子的年龄是完全一样大的。所谓的年龄不一样就象汇率一样。都是一万元人民币。其中，一位到美国换成美元，再到欧洲换成欧元，再回中国。
第一种情况，回到中国必须换成人民币，则还是一万元。第二种情况，只考虑数字，不考虑单位（币值），则数字不一样。
The twins are exactly the same age. The so-called age is not
the same as the exchange rate. All are RMB 10,000. Among them, one
went to the United States to exchange for dollars, then went to
Europe to exchange for euros, and then returned to China.
In the second case, only the number is considered, and the
unit (currency value) is not considered, the numbers are
different.
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