The outer walls and the foundation slab constitute a watertight basin, made of water-resistant concrete.

外墙和基础地面由防水混凝土浇筑，具有防水功能。

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These are integrated into the house's concrete foundation slab and distributed along three of its facades.

它们融入进住宅的混凝土基础底板中，沿着三边的立面分布。

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Meanwhile, it ensures the basement foundation slab and the external wall free of leaking, satisfying waterproof requirement.

同时确保地下室底板和外墙无渗漏，满足了防水要求。

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The design featured a wooden frame on top of a concrete-slab foundation, with an exterior covered in gray asbestos shingles. (Steel was in short supply.) The structure violated the Cambridge fire code, but it was granted an exemption because of its temporary status.

NEWYORKER: Groupthink

Gone is the basement level of the pyramid the heftiest slab a foundation of breads, starches and other carbohydrates.

FORBES: U.S.D.A. Topples Food Pyramid With A Very Expensive Plate