把布折叠，把两层缝在一起。
两层通道布线问题在超大规模集成电路自动布图设计中是关键步骤之一。
Two-layer channel routing is one of the key steps in the automatic layout design of VLSI chips.
当你喝第一口卡布·奇诺的时候，在嘴里上下两层咖啡混合在一起的口感会让你感到难以置信的满足。
There is something incredibly satisfying about blending both the bottom and top layer of a cappuccino in your mouth as you take the very first sip.
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