spearhead dieback

例句：

1. 1. The new leader isspearheading a major reform in thecompany.
   新领导正在引领公司的重大改革。
2. 2.He was the spearhead of the teamthat won the championship.
   他是赢得冠军的团队的领军人物。
3. 3. The new policy willbe the spearhead of our efforts toimprove public services.
   新的政策将成为我们改善公共服务努力的先锋。