Acid rain and polluted air also damage the bricks and stonework of buildings, and corrode the metalwork of steel Bridges and railings.
酸雨和被污染的大气还会侵蚀建筑物的砖块和石造的部分，腐蚀钢制桥梁和铁轨的金属部分。
Many galley pumps cannot be used with salt water because salt will damage the valves and seals or corrode internal metals.
许多厨房用的水泵无法用来抽海水，因为海水里的盐份会损害阀门和密封圈或腐蚀内部的其它金属物。
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