hang about=hang around闲荡，等待；靠近，纠缠hang back=hang off犹豫，畏缩不前hang by a thread垂危，千钧一发hang down下垂hang on紧紧握住；坚持下去；赖着不走；疾病等继续存在；电话不挂断；倚，靠；渴望hang on to紧紧握住hang out挂出hang together结合在一起；符合hang up挂起；挂断电话；延迟；中断