剑桥词典 g noun (FORCE) [ 可数名词：有复数形式的名词 ] physics specialized plural ga unit of measurement of the acceleration (= rate of change of speed ) of an object caused by gravity 重力加速度的符号 g noun (MASS) (also gm) written abbreviation for gram （质量单位）克（gram的缩写） 返回 g