剑桥词典 g noun (FORCE) [ 可數名詞：有複數形式的名詞 ] physics specialized plural ga unit of measurement of the acceleration (= rate of change of speed ) of an object caused by gravity 重力加速度的符號 g noun (MASS) (also gm) written abbreviation for gram （質量單位）尅（gram的縮寫） 返回 g