a callow youth的用法和样例：
- He was a callow youth when he joined the newspaper.
- He was only a callow youth.
- A callow youth is the final winner of all things. None other than he wins and tastes heartily the essence of lile.
- A callow youth.
- 1 A callow youth is the final victor in everything,it is that he absorbs the soul of life.