The main business of stockbroker is to help clients buy and sell shares.

股票经纪人主要业务是帮客户买卖股票。

It was improper of the broker to withhold the information from the stock exchange.

股票经纪人对交易所隐瞒信息行为是不正当。

He bragged that his father was the most successful stockbroker on Wall Street.

他吹嘘他父亲是华尔街上最功股票经纪人。