proclaim
vt. 正式宣布；显示
辨析：proclaim的主语只能是权力机关或政府领导；announce和declare则可以用普通个人做主语。
1.The government proclaimed both of them national heroes.
政府宣布他们两人为民族英雄。
2.His accent proclaimed that he was a southerner.
他的口音表明他是南方人。
3.His manners proclaimed him a gentleman.
他的风度显示出他是绅士。
proficiency
n. 熟练, 精通
1.His proficiency as a surgeon is well known.
他作为一名外科医生的水平是有名的。
2.I was proficient at my job.
我对工作很精通。
profile
n. 侧面（像）；轮廓, 外形； 简介, 概况, 传略
v.为...描绘，为...写传略
1.He drew her profile.
他给她画侧面像。
2.We could see the profile of a distant hill if it is very clear.
如果天气晴朗, 我们可看到远山的轮廓。
3.The newspaper publishes a profile of a leading sportsman every week.
该报每周刊登一篇关于一名优秀运动员的简介。
profit
n. 利润, 收益, 赢利
vt. & vi. 获益; 得利于
搭配：make a profit on 在...上获利
profit by/from 从...中得到益处
辨析：指“利润”时只能用profit，不用benefit。
1.It's profit you're after.
你所追求的是利润。
2.What's the profit of doing that?
做那件事有什么好处呢?
3.Taking these courses profited him.
选修这些课程对他有好处。
4.He hoped to profit from his investments.
他希望从投资中获利。
