to grasp (often fig.); to master; to know well; to understand sth well and know how to use it; fluency; to control; to seize (initiative, opportunity, destiny)[cedict]
多少
duō shǎoㄉㄨㄛ ㄕㄠˇ
duō shaoㄉㄨㄛ ㄕㄠ˙
number; amount; somewhat[cedict]
how much; how many; which (number); as much as[cedict]