详细解释:n. 绕绳下降
词型变化：
动词过去式:rappelled过去分词:rappelled现在分词:rappelling第三人称单数:rappels英语解释：
名词 rappel:
(mountaineering) a descent of a vertical cliff or wall made by using a doubled rope that is fixed to a higher point and wrapped around the body动词 rappel:
lower oneself with a double rope coiled around the body from a mountainside同义词：abseil, rope down