And it causes more than one-fourth of deaths.

VOA: special.2011.01.11

On the fourth day, they opened one of the cans of turnips and ate it.

第四天，他们开了一罐腌萝卜来吃。

耶鲁公开课 - 公正课程节选

And the fourth one is the '60s.

第四个阶段是六十年代

耶鲁公开课 - 美国内战与重建课程节选

The reason that 3' is important is that when you polymerize two nucleotides together and a third nucleotide, and a fourth nucleotide, when you polymerize nucleotides together they get polymerized, the phosphate of one gets linked to the 3' carbon of another.

'碳部位重要是因为,当你把两个核苷酸聚合在一起,然后再聚合第三个,第四个的时候,核苷酸在聚合时,磷酸基与另外一个戊糖的3'碳部位连接

耶鲁公开课 - 生物医学工程探索课程节选

You reach Egypt, and of course, Egypt is one of the great empires of antiquity going back into, perhaps, certainly into the fourth millennium, possibly into the fifth, by no means as powerful as it used to be, far from it.

你来到了埃及的领地,当然,埃及是古代最伟大的帝国之一,它有近四千年,甚至五千年的历史,毫无疑问,古埃及达到了空前绝后的强大

耶鲁公开课 - 古希腊历史简介课程节选