fluid bituminous material

例句：

1. 1. The liquid is very fluid and can be easily poured.
   这种液体非常流动，可以很容易地倒出来。
2. 2. The river flows through the valley, making it a perfect place for fishing.
   这条河流经山谷，是钓鱼的理想之地。
3. 3. The oil is a fluid that can be used in many different applications.
   这种油是一种流体，可以用于许多不同的应用。