原级：crevasse
1. crevasses
1. They shelter in hollow trees, rock crevasses and caves but have no permanent dens.
2. They dropped their feces into glacier crevasses, trusting the force of moving ice to grind the waste material away.
3. crevasses
3. The ice collapse destroyed the path set by climbers and their Sherpa guides using aluminum ladders and ropes to move over crevasses.