地壳运动 dìqiàoyùndòng crustal movement Origin Definitions Defs Strokes Stroke Words Sentences Sents 地壳 地殼 dìqiào earth's crust The solid outermost layer of the earth, composed of hard rock; it averages about 35 kilometers thick under continents and 7 kilometers under oceans.运动 運動 yùndòng verbnoun movement movement; motion; the change of position of an object in space