a baptism of fire的用法和样例：
- John has become a traffic policeman now and his first day of work will be a baptism of fire.
- Spalletti has had something of a baptism of fire during his spell in the Eternal City, which has been characterised by internal squabbling, a long list of injuries to key players and underachievement.
- The new secretary found working under him a real baptism of fire.
- an ordeal; the racket; an acid test; a baptism of fire
- The job's my baptism of fire.