spearhead
n (usu sing 通常作单数) person or group that begins or leads an attack 先锋; 前锋; 先头部队
The new managing director will act as spearhead of the campaign. 新上任的常务董事将在这场运动中挂帅. spearhead, v [Tn]
act as a spearhead for (sth) 为(某事)作先锋; 带头做(某事)
The tanks spearheaded the offensive. 坦克在那次进攻中打头阵.