The asphalt playgrounds have been grassed over or sown with flowers.原来的柏油操场已经覆上了草皮或种满了鲜花。I smelled tarry melted asphalt.我闻到了柏油熔化了的味道。The street is paved with asphalt.街道被铺上柏油....
A model asphalt had been separated into four components: asphaltenes , saturates, aromatics and resins.用四组分法将沥青分为饱和分 、 芳香分、胶质、沥青质.The paper introduces the research on RHJ asphalt emulsifiers cations.介绍了RHJ型阳离子沥青乳化剂的研究过程....