境地 jìngdì HSK7 circumstances Origin Definitions Defs Strokes Stroke Words Sentences Sents 环境地质学 huánjìngdìzhìxué environmental geology The study of geological factors that affect human safety, health, and the environment, focusing on land use and disaster prevention.边境地区 biānjìngdìqū border area a region or area along the border of two countries