profit多局限于物质或金钱的利益,指"利润"时,常用复数；
benefit是最常用的词,可兼指物质利益和精神方面的好处.
如：They are tireless in hunting for super profits.他们不倦地追求超额利润.
He received much benefit from reading the novels.读小说使他受益匪浅.
介词on与不同的名词或动词连用意思不同,除了表示时间的用法之外,主要表示为.为基础,关于.等.
在以下一些词组中,有表示目的的意思：
I”ve come here on business.我是有公事来的.
They went to Bern on a mission.他们到伯尔尼去执行一项使命.
They has been away on a long trip.他们出去做一次长途旅行.
I”ll go home on leave next month.下月我将休假回家.
I went on business to Shanghai.I did not take leave.我是公出去上海的,不是不告而别.
She came to see you on purpose.她是专程来看你的.
He came here on purpose to discuss it with you.他到这来是要与你讨论这件事的.