... 用板包覆：board lining 用白合金浇铸：lined with white metal 用白粉作标记：chalking ...
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A black staircase that winds up through the narrow home was lined with white powder-coated metal guards that are perforated.
一部黑色的楼梯蜿蜒通过狭窄的家，楼梯使用了白色涂层的金属穿孔板。
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