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知乎,让每一次点击都充满意义 —— 欢迎来到知乎,发现问题背后的世界。
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知乎,让每一次点击都充满意义 —— 欢迎来到知乎,发现问题背后的世界。
A basement or cellar is one or more floors of a building that are completely or partly below the ground floor. Especially in residential buildings, it often is used as a utility space for a building, where such items as the furnace, water heater, breaker panel or fuse box, car park, and air-conditioning system are located; so also are amenities such as the electrical system and cable television di... Wikipedia