An sk_buff contains packet data and also state data that cover multiple layers of the protocol stack.
sk_buff中包含了报文数据，以及涉及协议栈中多个层次的状态数据。
All right. The rules, though, are, they can only move one disk at a time, and they can never cover up a smaller disk with a larger disk. OK. Otherwise you'd just move the whole darn stack, OK?
好，规则是，他们只能一次挪动一个盘子，并且不能把大盘子放在小盘子上，不这样的话你就直接，把这一堆盘子都挪过来了对不对？
The technologies include Cover Flow, which lets users flip through album covers and other content as if through a stack of cards;
技术涉及封面浏览（CoverFlow），它让用户像穿梭于一堆纸牌一样在专辑封面和其他内容之间跳转；
Ice dam, ice cover and ice jam, which are formed by stack, jammed and collective ice, can increase river resistance and water stage, resulting in flood, construction damage and navigation problems.
冰块堆积，堵塞和聚集形成的冰坝、冰盖和冰塞会导致河道阻力增加，致使上游水位上涨，并可能造成冰期洪水，建筑物破坏，航运不畅等危害。
Stack crepes on a microwave-safe plate, and cover with a paper towel;
将薄饼铺在微波烤盘上，铺一层纸巾在上面；
Stack crepes on a microwave-safe plate, and cover with a paper towel;
将薄饼铺在微波烤盘上，铺一层纸巾在上面；
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