我看到一句讲90年代俄克拉荷马城爆炸的话:The blast was so powerful that street signs and parking meters has been ripped from the ground。Pedesrains were lifted off their feet and thrown across the sidewalk。
我查词典里面lift off有发射、起飞的意义,但好像用在这句话里不合适,请问这句话里的be lifted off their feet如何理解?