急！！！翻译：移民真正能融入美国社会的时间是：三代人

It takes three generation for new immigrants to assimilate into the American society.

The time it takes for new immigrants to assimilate into the American society : three generations.

都可以。

The time it takes for an immigrant to be fully accepted into the American society is three generations.

三代人基本没问题了,但是就会和中国社会及中国人的思维脱节