原子质量 yuánzǐzhìliàng atomic mass Definitions Defs Origin Strokes Stroke Words Sentences Sents 原子 yuánzǐ noun atom atom; atomic; the smallest unit of a chemical element, consisting of a nucleus surrounded by electrons质量 質量 zhìliàng noun mass a physical measure of an object's inertia and gravitational attraction, usually measured in kilograms
