8 vanguard

vanguard
n
the vanguard [sing]1 leading part of an advancing army or fleet 先头部队; 先头舰队; 前锋; 先锋.
2 (fig 比喻) leaders of a movement or fashion (运动或时尚的)先驱, 先锋, 领导者
    researchers in the vanguard of scientific progress 在科学进步前列的研究人员. Cf 参看 rearguard (rear1).