也叫做黑金属
Also known as black metal
以上为机器翻译结果，长、整句建议使用 人工翻译 。
这样的白镴，也叫做黑金属，因为铅和酸性食物接触容易流失，白镴随着年月会变得很暗。
Such pewter, also called black metal, darkened greatly with AGE, and the lead readily leached out in contact with acidic foods.
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