on or above the ground 在地面上(的) [as adv.]it has suggested that a new line be built overground. 有人建议在地面上修建一条新的交通线。 [as attrib. adj.]a huge heating system pipes heat along overground tubes. 巨型供热系统沿着地面管道送热。 ■[as attrib. adj.]legitimate; not subversive 合法的;非颠覆性的 they devised plans for using overground political processes. 他们制订了使用合法政治程序的计划。