n.[C]

1. 矛头，枪尖
2. 先锋；先锋部队[S1][（+of）]
   A spearhead of tanks led the infantry attack.

   坦克先遣队引导步兵进攻。

vt.

1. 当……的先锋；为……扫清道路；带头
   Plastics spearheaded the advance in synthetic materials.

   塑料是合成材料发展的先导。

   The airborne troops spearheaded the crossing of the river.

   空降兵在渡河作战中担任先导。

   The project to explore Mars is spearheaded by NASA.

   探索火星的计划是由太空总署带领的。

n.

1. the point of a spear.
2. an individual or group leading an attack or movement.

v.