you leave your ancestors as well.

你也就离开了你的祖先
All of that means we need to explain why these folks do

综上所述我们来想想为什么这些人
what they end up doing, and we have some hints,

要背井离乡呢我们有一些线索
but of course we do not know with any certainty or any confidence.

但是我们并没有有力的证据
If you ask the question why did many Italians leave their homes,

如果问及为什么很多意大利人离开家乡
especially south Italians in the late nineteenth century and come--

特别是十九世纪居住在意大利南部的人们
well, go all over the world actually,

事实上他们的足迹遍布全球
to South America, Australia,

南美澳大利亚
but the largest numbers to the United States.

但更多的是到美国来了
Why did they do that? Well, we don't have to do a lot of guessing.

这是为什么呢我们不用瞎猜
We have written evidence from the people who went

这里有移民留下的文字材料
and they say why they did it.

上面写得很清楚