The first envelope comprises the load-bearing structure of metal beams and columns sitting on a concrete slab foundation.

正立面由位于一个混凝土板基础上的具有承重结构作用的金属梁和柱子组成。

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When the metal signal breaks through the detection envelope, the product is rejected.

当金属信号通过休息信封检测，该产品将被拒绝。

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The envelope is made of standing-seam metal, with lines rotating to create visible, separate polygons and ensure water runoff.

别墅的外表皮是由直立锁边的金属构成，金属板上的线条旋转形成可见的、单独的多边形，确保了水的流向。

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Larger modern airships rely on a semi-rigid design, in which engines and passenger compartments are suspended from a metal keel that runs along the bottom of the envelope and prevents it from distorting under the load.

ECONOMIST: Pushing the envelope