1．profession n．(需要高等教育和训练的)专业，行业→professional adj.专业的
2．previous adj.以前的，先前的→previously adv.以前
3．hike v．远足→hiker n．远足者
4．volcano n．火山→volcanic adj.火山的
profession n．专业，职业；同业，同行；表白，声明
①The medical profession is always telling us we should exercise more.
同业，同行
②Does she really think of adopting teaching as a profession?
专业，行业
③He made a profession of friendship to his classmate Mary.
表白，声明
