hazardous conditions短语¹⁴⁴⁹⁷²⁺² 基本例句 危险状态 According to hazardous conditions and loss of life resulted by tunnel fire, the author reports about tests and re- search projects on the design of fire prevention in European railway tunnels. 针对隧道火灾所导致的各种险情和人员伤亡，对欧洲铁路隧道防火设计的科研项目和试验作了相关介绍。 d.wanfangdata.com.cn