n.先锋，前锋；先头部队；矛头；枪尖vt.当…的先锋；带头； 变形： 复数：spearheads过去式：spearheaded过去分词：spearheaded现在分词：spearheading第三人称单数：spearheads 英英释义： spearhead[ 'spiəhed ]n.someone who leads or initiates an activity (attack or campaign etc.)the leading military unit in an attackthe he