1、paradox n.a person,thing or situation that has two opposite features and therefore seems strange矛盾的人（或事情、情况）
eg:It is a paradox that such a rich country should have so many poor people living in it.
2、reward n.a thing that you are given because you have done something good,worked hard,etc.奖励；回报；报酬
eg:A 1000 reward has been offered for the return of the stolen painting.
~sb.（for sth./doing sth.）give a reward to sb.给某人报酬；奖赏某人
eg:Is this how you reward me for helping/my help?
rewarding adj.（of an activity,etc）worth doing;satisfying（指活动等）值得做的，令人满意的
eg:Gardening is a very rewarding pastime.
3、entrepreneur n.a person who makes money by starting or running businesses,especially when this involves taking financial risks创业者；企业家
eg:He would not have succeeded in such a risky business if he had not been such a clever entrepreneur.
enterprise n.business company or firm事业单位；企业单位；公司；商号；商行
eg:one of the most successful enterprises of its kind
enterprising adj.having or showing enterprise有事业心的；表现出进取心的；有胆量的
eg:an enterprising young man
4、exclude v.to prevent somebody/something from entering a place or taking part in something把…排斥在外；防止…进入；阻止…参加
eg:exclude a person from membership of a society
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