先行xiānxíng 1.走在前面的{go ahead of the rest; start off before the others}: ～者{forerunner}|～官。{commander of an advance unit or vanguard} 2.先进行;预先进行{beforehand; in advance}: ～试办{run on a trial basis}|～通知。{notify in advance} 3.指先行官。{commander of an advance unit or vanguard}?0