我们一直在讨论20世纪二三十年代的电影，以及当时还未形成的、而如今已被我们熟知的电影类别。

We've been discussing films in the 1920s and 30s, and how back then film categories, as we know them today, had not yet been established.

youdao

更深入的灵感源于十九世纪二三十年代的建筑。

Further inspiration comes from 1920s and '30s constructivism.

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上世纪二三十年代经济大萧条时期，保护主义曾盛行一时，带来了严重后果。

Protectionism was prevalent during the Great Depression in the 1920s and 1930s, but it only led to grave consequences.

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But I think it became, in most ways and in most definitions, a slave society surely by the 1820s or the 1830s.

我认为最主流的定义是,奴隶社会确实起源于,十九世纪二三十年代

耶鲁公开课 - 美国内战与重建课程节选

And that is exactly what the South began to see itself as, at least Southern leadership began to see itself as, as early as the 1820s and 1830s.

当时的南方就开始有那种感觉了,至少南方的领导层就开始有那种感觉了,那还是十九世纪二三十年代

耶鲁公开课 - 美国内战与重建课程节选

They reach the East Indies in the 1620s and the 1630s.

他们于十七世纪二三十年代至东印度地区

耶鲁公开课 - 欧洲文明课程节选