stepping surfaces of denudation梯级: stair; stairstep; step; flie ...剥蚀: denude; corrode; erode; wear ...面: face剥蚀面: denudation plane; exposure level; plane of denudation剥蚀面积: eroded area下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:梯级剥蚀面,即可在微信中查询翻译