play a leading role

• 起带头作用

play a leading role的用法和样例：

例句

1. Our monitor plays the leading role in our class.
   我们的班长在班级里起带头作用。
2. For all the concerns about the BoJ, however, many observers welcomed signs that the administration was beginning to take a lead on the matter.
   尽管对日本央行还有许多忧虑，很多观察者仍然欢迎政府在处理经济问题上开始起带头作用。