16.advantage， benefit， profit advantage 常指一种使某人处于比其他人相对有利的地位，机会或时机。如：He had the advantage of good education. (受过良好的教育对他十分有利。)
profit 多指报偿或报偿性的收入。如Did you make any profit last year?
(你去年赚钱了吗?)
benefit 指物质利益或精神方面的好处。如：I get no personal benefit from the business.(我个人从这家企业中并不获益。)
17.advise， convince， persuade均可表“劝说”。
advise表建议，规劝某人应该做某事或如何做。如：He advised me to put my money in the bank. (他劝我把钱存入银行。)
convince指向某人陈述事实，运用推理或逻辑证明使某人信服。如：We convinced Smith to go by train rather than plane. (我们说服了史密斯乘火车而不乘飞机前往。)
persuade指用感情说服某人去做某事。如：I persuaded him to go back to work.
(我说服他回去工作了。)
18.affect， effect
affect影响(动词)。如Smoking affects health.
effect效果，影响(名词)。如：Government policy will not have any effect on us.
