This was predicted by Einstein's theory of relativity at the beginning of the 20th centaury and has since been proved many times.
这一点由爱因斯坦在20世纪初做出预言，并且多次得到证明。
This was predicted by Einstein's theory of relativity at the beginning of the 20th centaury and has since been proved many times.
这一点由爱因斯坦在20世纪初做出预言，并且多次得到证明。
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