But suppose you are in a train and you're moving past me and you look at this piece of chalk.

但假如你在火车上,从我面前驶过,你看着这支粉笔

耶鲁公开课 - 基础物理课程节选

For example, if you were in a crowded train, and another passenger is staring at you,

例如，你在一节拥挤的车厢里，有一个乘客老是盯着你，

I wish 课堂 - SpeakingMax英语口语达人

So the Earth is an inertial frame of reference, if you go in a train relative to the Earth at constant velocity, you're also inertial.

所以,地球是一个惯性参考系,如果你坐在相对于地球匀速运动的火车里,你也处于惯性状态

耶鲁公开课 - 基础物理课程节选

If they are glued together in the right way they make up a train.

如果它们合理组装在一起,就能形成火车。

耶鲁公开课 - 死亡课程节选

And 72 hours by train he found himself on a huge cotton plantation, near Pickensville, Alabama, on the in west central Alabama, on the Mississippi border, at 14-years-old.

在搭乘了七十二小时的火车后,他发现自己身处亚拉巴马的皮肯斯维尔附近,一个巨大的棉花种植园中,在亚拉巴马西部的中心,密西西比的边界,那年他仅仅十四岁

耶鲁公开课 - 美国内战与重建课程节选

Two hours,you can be on a damn train to New York City and you'll be lucky if you get eighty miles in two hours, or an hour and fifty minutes.

要知道,两个小时都可以做火车去纽约了,但如果是步行,八十公里你一个小时五十分钟,到两个小时内走到就算不错了

耶鲁公开课 - 1871年后的法国课程节选