That was about 2 percent of the U.S. population in 1860, the equivalent of 6.1 million today

约占1860年美国人口的2%，相当于今天610万人。

youdao

That was about 2 percent of the U.S. population in 1860, the equivalent of 6.1 million today

约占1860年美国人口的2%，相当于今天610万人。

youdao