劍橋詞典the part of an army or navy that leads an attack on an enemy 先頭部隊(duì)，先鋒；尖兵 比較rearguard a group of people who lead the development of new ideas , or a leading position in the development of something （思想的）先驅(qū)；領(lǐng)先地位 He is in the vanguard of economic reform . 他是經(jīng)濟(jì)改革的領(lǐng)頭人。 也見 the forefront 返回 the vanguard