用繩索下口
Rappel \Rap"pel\, n. [F. Cf. {Repeal}.] (Mil.) The beat of the drum to call soldiers to arms.
rappel v : lower oneself with a double rope coiled around the body from a mountainside; "The ascent was easy--roping down the mountain would be much more difficult and dangerous"; "You have to learn how to abseil when you want to do technical climbing" [syn: {abseil}, {rope down}] [also: {rappelling}, {rappelled}]