社会的流动性伴随他们而来，志向在城市中生活，这是十九世纪欧洲出生率下降的主要因素。

Along with them goes social mobility, ambition to rise in the urban world, a main factor in bringing down the births in Europe in the nineteenth century.

youdao

它非常壮观，因为在十九世纪九十年代，我们达到了西方古典管弦乐队的顶峰，这是一个巨大，美丽，有力的乐器。

It's quite spectacular because here in the 1890s we have reached the apex of the Western classical orchestra, this big, beautiful, powerful instrument.

youdao

这是国家十九世纪仅仅因为商贸原因而曾经被西方攻击肢解。

This is a country that, in the nineteenth century, the West attacked and subjugated purely for commercial reasons.

youdao

This is down the Rue de Rivoli, which was completed in the 1850s and '60s, and the damage is staggering.

沿着里窝利路,这条路是在十九世纪五六十年代修好的,而军队进入之后造成的破坏是惊人的

耶鲁公开课 - 1871年后的法国课程节选

And he actually did this in the late 1800's, back before even all of the elements that we know today were discovered, really only about 60% or so, 70% were discovered then that we now know today.

他最终在十九世纪晚期完成了这一壮举，难能可贵的是,虽然我们现在已经发现了所有的元素，但在当时已知的元素只有我们现在知道,百分之六七十，在这种情况下。

麻省理工公开课 - 化学原理课程节选

Now there's a nineteenth century name for you.

这是一个十九世纪的名字

耶鲁公开课 - 美国内战与重建课程节选