boneblack
柯林斯词典
1. N a black residue from the destructive distillation of bones, containing about 10 per cent carbon and 80 per cent calcium phosphate, used as a decolorizing agent and pigment (骨头分解蒸馏后得到的)骨黑
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1. N a black residue from the destructive distillation of bones, containing about 10 per cent carbon and 80 per cent calcium phosphate, used as a decolorizing agent and pigment (骨头分解蒸馏后得到的)骨黑