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单词 coal tar
释义 coal tar
 —coal-tar,  adj.  
 a thick, black, viscid liquid formed during the distillation of coal, that upon further distillation yields compounds, as benzene, anthracene, and phenol, from which are derived a large number of dyes, drugs, and other synthetic compounds, and that yields a final residuum (coal-tar pitch), which is used chiefly in making pavements.
 [1775-85]
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更新时间:2024/12/23 15:02:57