maltha

不可数

A viscous, black, semi-solid substance that occurs naturally and is intermediate between petroleum and asphalt.

• 🇨🇳一种粘稠、黑色、半固体的天然物质，介于石油和沥青之间。

1. Thick black tar C2 formal technical

   A viscous, black, semi-solid hydrocarbon substance that is intermediate between petroleum and asphalt, often found in natural deposits.

   • The ancient builders used maltha as a waterproofing agent for their structures.
   • Geologists discovered a large deposit of maltha in the region.
   • Maltha was historically employed as a sealant for ships and roofs.

   🇨🇳厚黑焦油

   同义词: asphaltbitumenpitchtar