bituminous froth

例句：

1. 1. The asphalt froth was used to coat the road surface.
   沥青泡沫被用来覆盖道路表面。
2. 2. The asphalt froth had a smooth texture that made it easy to walk on.
   沥青泡沫具有光滑的质地，这使得它易于行走。
3. 3. The asphalt froth was a popular material for roofing in the 19th century.
   沥青泡沫是19世纪流行的建筑材料之一。