Well, it is the stuff that lives in a small box whose base is that piece of surface and whose other side is given by the vector field.
单位时间内的流量就是一个小立体，它的底是曲面上的一块，它的高由向量场给出。
Plus, they host sleepovers called "Slumber Parties in a Box" where girls are given free stuff, and of course, there's more talk of products.
此外，她们在别人家过夜，这被称为“在盒中睡觉“，在这里女孩们会得到免费的东西，当然，还有更多关于产品的交谈。
Fold your flag when storming. Don't just stuff it in a drawer or box.
暴风雨时，叠好旗帜。不要仅仅塞进抽屉或盒子里。
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