More than four-thousand shells had been fired during the thirty-three hours of fighting.

VOA: special.2009.08.13

You know, if I had like shells and peas here I could make some more money. What do I do?

要知道，如果我喜欢贝壳和豌豆的话,那么我可以赚更多的钱？

麻省理工公开课 - 计算机科学及编程导论课程节选

Other than just in poisons and in organic synthesis shells, you might also find them in some things we're more familiar with, such as almonds.

除了在毒药以及有机合成的容器中，你可能还会在我们更熟悉的,东西中找到它们，比如杏仁。

麻省理工公开课 - 化学原理课程节选