端午节是个农历节日，在农历第五个月的第五天。

Dragon Boat Festival is a lunar holiday. It is on the fifth day of the fifth lunar month.

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汤姆考虑在第五个万圣节的时候装扮成牛仔。

Tom is thinking about going as a cowboy for the fifth year at Halloween.

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作为上赛季系列赛费城人队夺冠功臣之一，哈默尔斯本场比赛表现不佳甚至在第五节就被换下。

Hamels, one of the Phillies' heroes in last year's World Series success, was struggling and was replaced in the fifth.

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I wanted to talk about one last concept and this is one the boxes from Chapter 5 and you've already been using this in your homework.

我想说的最后一个概念,就是第五章里的一节,你可能已经在作业里用到了

耶鲁公开课 - 生物医学工程探索课程节选