n.急流；湍流
His canoe was there, on the river below the rapids. 他的独木舟在河里的急流中。
The Rhosili is a turbulent, swift-flowing river, full of dangerous rapids and currents. 罗西里是一条汹涌的迅速滚滚的河，充满着危险的险滩和湍流。
