他从一条面包上切下四厚片。

He cut four thick slices from the loaf.

《牛津词典》

youdao

我在自己公文包上铺展开的地图中勾画出了这条河的流向。

I traced the course of the river on the map spread out on my briefcase.

《柯林斯英汉双解大词典》

And so it has what? In contrast to the sigma, it has a nodal plane containing both nuclei.

这是什么，和sigma相反，它是包覆在核上的平面电子云，有一个界面。

麻省理工公开课 - 固态化学导论课程节选

Or, if you are at a party and you're ready to leave but you've left your bag with the host,

又或者，你在一个派对上，你准备要走了，但是你刚才把你的包放在派对主人那里了，

Where 课堂 - SpeakingMax英语口语达人

And, as you know, Einstein made many, many, many very important contributions to science and relativity, but he called this his one single most important contribution to science the relationship between energy and frequency and the idea of photons.

于这些波包里，你们也知道，爱因斯坦在科学和相对论上,做出了非常非常非常多的贡献,但它把这个叫做他对科学,最重要的贡献，就是能量和,频率之间的关系以及光子的概念。

麻省理工公开课 - 化学原理课程节选