1. 槽：最简单的雪地确保姿势是坐姿腰式确保法 (sitting hip belay),你可以利用一个狭窄的裂隙 (shallow crevasse),一个日照杯孔 (suncup),一个高及腰部的雪槽 (moat),一个突起硬冰 (serac),或一个雪坡上突出的岩石.
2. 壕沟：我在争斗志(mettle),网络添麻烦(nettle),谁在削木头(whittle),扔掉掐 死你(throttle) raff(大量)淫雨霏霏,他日关税重重(tariff),雪上轻舟飞过(skiff),quaff 豪情痛饮 你毛在呻吟(moan),他毛入壕沟(moat) 微尘是 mote,
1. 护城河;城壕
A moat is a deep, wide channel dug round a place such as a castle and filled with water, in order to protect the place from attack.