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n.城墙; 围墙; 墙; 壁; 墙壁; 屏障; 隔阂; 壁垒v.用墙把…围住 复数：walls过去分词：walled现在分词：walling过去式：walled第三人称单数：walls 牛津词典 noun 城墙；围墙a long vertical solid structure, made of stone, brick or concrete, that surrounds, pides or...
