Among the many images of the famous mill girls is this one, taken in 1850,I believe, in Lowell, Massachusetts.

在众多图片中,著名的纺织女工是其中之一,大概拍摄于1850年,在洛威尔纺织厂,马萨诸塞州

耶鲁公开课 - 美国内战与重建课程节选

So that was the transportation here when San Francisco was settled in 1850.

早在1850年旧金山正式成立的时候，交通工具就是有线缆车。

旧金山的公共交通 - SpeakingMax英语口语达人

One-third of every steamboat built in the United States before 1850 exploded and destroyed became a wreck.

850年以前,美国制造的每三艘蒸汽船,就有一艘爆炸或毁坏,彻底地报销

耶鲁公开课 - 美国内战与重建课程节选

In an 1850s anti-slavery speech she said, among other things, this conclusion in effect, she's answer the question now, "Why has slavery boomed and persisted and grows still?"

她在1850年反奴隶制演讲中说过,这段很精辟,在所有论述中尤为抢眼,她给出了问题的答案,"为何奴隶制度仍然能够蓬勃发展呢"

耶鲁公开课 - 美国内战与重建课程节选