| 释义 |
coal tarn.（名词）- A viscous black liquid containing numerous organic compounds that is obtained by the destructive distillation of coal and used as a roofing, waterproofing, and insulating compound and as a raw material for many dyes, drugs, and paints.煤焦油：一种粘性黑色液体，含有多种有机化合物，由煤的干馏获得，用作保护剂、防水剂、绝缘化合物，并作为许多染料、药品和油漆的原材料
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