同根常考词汇：需掌握
◆profit[‘prfit]n.利润，赢利，利益：v.有益，获利，赚钱
用法：profit by/from：从……中得到益处
举例：Taking these courses profited him.
选修这些课程对他有好处。
◆profuse[pr’fjus]a.大量的，丰富的
举例：He was so profuse with his money that he is now poor.
他过去很奢侈，结果现在穷了。
◆prosperous[‘prsprs]a.繁荣的，兴旺的
举例：It used to be a very prosperous town.
这个城镇过去很繁荣。
同形：prosper[’prsp]v.兴隆，成功，昌盛
prosperity[prs‘periti]n.繁荣，兴旺