You have two tickets, $400 worth, and on the way to the concert you lose the tickets.

你买了两张，共值400美元，然而在你去音乐会的路上,你把两张票弄丢了。

耶鲁公开课 - 金融市场课程节选

And during the siege there were sixty-five balloon flights carrying two and a half million letters, weighing a grand total of 10,000 kilograms, so roughly about 20,000 pounds.

在巴黎被围期间,共放出了六十五个热气球,带走了多达两百五十万封信,合计重量约有一万公斤,也就是两万磅左右

耶鲁公开课 - 1871年后的法国课程节选

The Netherlands also resisted absolutism, and the Dutch Republic remained the Dutch Republic; although, for reasons that we'll see later, the Dutch Republic ceases to be a great power in the 18th century.

荷兰抵制绝对统治的政体,保留了共合制,然而,后面我们将说到,荷兰共和国在十八世纪没落了

耶鲁公开课 - 欧洲文明课程节选

Then those antigens get expressed with MHC just like they did in all the other cells inside the host, but particular cells of the innate immune system have a different kind of MHC called MHC2.

这些抗原同MHC共表达,就如同抗原在其他宿主细胞中那样,但先天免疫系统有一类特殊的免疫细胞,具有一种称为MHC2的不同MHC

耶鲁公开课 - 生物医学工程探索课程节选