Such a correlation had appeared in the first half of the 20th century.

这两者此消彼长的相关性在20世纪上半叶已经有过类似的表现。

youdao

Such a correlation had appeared in the first half of the 20th century.

这两者此消彼长的相关性在20世纪上半叶已经有过类似的表现。

youdao