词汇	道床系数
释义	道床系数医ballast coeffi-ient；ballast modulus
随便看	environment label environment landscape environment landscape in residence environment landscapes environment language environment lapse rate environment law environment law education environment law enforcement environment law enforcement by administration environment lawmaking Environment layout environment legal environment legal system environment legislation Environment Legislative Information System environmentlel policy environment level environment liabilities environment liability insurance environment liaison board environment lighting environment light source environment limit environment limitation