1. cover with tar or asphalt, of roads. 
   用沥青或柏油覆盖路面。
2. a thick black tar intermediate between petroleum and asphalt. 
   一种稠而黑的焦油中间体，介于石油和沥青之间。
3. joint management, joint purchase, joint sales 
   联营、联购、联销
4. cover with asphalt or a similar surface, of roads. 
   在路的表面用沥青或类似沥青覆盖。
5. A bituminous material, such as asphalt, used to pave roads. 
   沥青，柏油一种含沥青物质，如沥青，用于铺路

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