沥青, 柏油
a black viscous mixture of hydrocarbons, obtained naturally or as a residue from petroleum distillation, used for road surfacing and roofing.
:
• The road was paved with bitumen.
这条路是用沥青铺成的。
• Roofing felt is often coated with bitumen for waterproofing.
屋顶毡通常涂有沥青以防水。
