屋顶涂抹了一层沥青。
在古埃及，穷人死后，他的躯体仅用厚厚的一层沥青包起来以隔绝空气。
In Ancient Egypt, when a poor person died, his body was merely enclosed in a thick layer of bitumen to keep out the air.
为了降低水泥膨胀所引起的膨胀应力，延长瓷绝缘子的使用寿命，在胶装时一般在瓷体和水泥之间涂一层沥青缓冲层。
In order to reduce the expansion stress resulting from cement's expansion and prolong the life-span of porcelain insulator, a thin asphalt buffer layer is coated between the porcelain and the cement.
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