gravitationn.[物]引力；吸引作用；下沉Gravitation launching重力式下式gravitational electric引力磁场gravitational stimulus地心吸力刺激gravitational abnormal重力异常gravitational settling重力沉陷,重力沉降gravitational receptor重力感受器gravitational moisture重力水分gravitational redshift引力红移gravitational pressure重力压力gravitational collapse[天]引力坍缩