And so there are only two kinds of waves that can exist on this violin string, standing or traveling.

由于这只有两种波,可以存在在这条弦上，驻波或行波。

麻省理工公开课 - 固态化学导论课程节选

He ended up on a circus sideshow traveling through the country with the big steel pipe that went through his head.

最终,在一个全国巡游的马戏团里,大钢管打烂了他的脑袋,结束了他的生命

耶鲁公开课 - 心理学导论课程节选

Especially the dragons. "look at the dragon". I said, "that's part of the festival Harazka and we were traveling on this train to go to Harazka because we were going to be a part of the festival".

他们对恐龙尤其关注，说：“看那个恐龙“,我说：“那是节日的一部分,我们正搭乘火车去,因为我们会,参与到节日中“

麻省理工公开课 - 媒体、教育、市场课程节选

So fruitful is their land that they are spared the evil necessity of traveling on ships and there you have an interesting point about the Greeks.

他们的土地丰饶,这一切让他们远离了航行的厄运,这时你会发现关于希腊很有趣的一点

耶鲁公开课 - 古希腊历史简介课程节选

Since we would be traveling to several places on the world, there were several categories that listed the places that were going.

因为我们要去,世界上的几个地方旅行，所以将它们,分成了几类。

麻省理工公开课 - 媒体、教育、市场课程节选