be top dog

例句：

1. 1. She's always been abit of a boss around here.
   她总是这里的一把手。
2. 2. He's the boss athis company now.
   他现在是公司的老板。
3. 3. Thenew CEO is set to take over asthe top dog.
   新任首席执行官将接替成为头号人物。