劍橋詞典the part of an army or navy that leads an attack on an enemy 先頭部隊，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）先敺；領(lǐng)先地位 He is in the vanguard of economic reform . 他是經(jīng)濟改革的領(lǐng)頭人。 也見the forefront 返回 the vanguard