a head butt的用法和样例：
- While the NBA described what Nene did as a head butt, Nene disagreed with that terminology.
- A serpent having a head at each end of its body.
- Tom is taller than John by a head.
- The Queen's horse won by a head.
- He is a head taller than his younger sister.
a head butt的相关资料：