n.矛尖；突擊隊的先遣隊；攻擊的最前線
v.做先鋒；在前面帶頭做先鋒
A spearhead of tanks led the infantry attack. 坦克先遣隊引導步兵進攻。
The tanks spearheaded the offensive. 坦克在那次進攻中打頭陣。
You will spearhead the sales campaign. 你當促銷活動的先鋒。
