The concept of regression goes back to the mathematician Gauss, who talked about fitting a line through a scatterof points.
回归这个概念要追溯到数学家高斯,讨论的是从若干散点中切合出一条直线。
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The bottom line, he says, is that "the only process we are aware of that could cause such large isotope scatter is if the hydrogen content of the moon is 10,000 to 100,000 times less than [on] Earth.