柯林斯词典asphalt /ˈæsfælt/ 1. N-UNCOUNT Asphalt is a black substance used to make the surfaces of things such as roads and playgrounds. 沥青; 柏油[oft N n] 返回 asphalt剑桥词典a black , sticky substance , often mixed with small stones or sand , that forms a strong surface when it becomes hard 沥青；柏油 返回 asphalt