| 释义 |
☞ undercutundercutting/ˌʌndəˈkʌtɪŋ ||; ˌʌndɚˈkʌtɪŋ/noun [u] (in geography 地理学) the destruction by water of a softer layer of rock below a hard top layer so that after a long period of time the top layer is not supported and falls down 底切，暗掘（指岩层底部的松软部份被水流掏空，久而久之便塌陷） ☞ undercut |