1、He made a fortune as an arbitrageur by taking advantage of discrepancies in stock prices between different markets.
他作为一名套利者，在不同市场的股票价格差异中获得了巨大的财富。

2、The arbitrageur quickly bought shares in one market and sold them in another to profit from the price difference.
这位套利者迅速在一个市场买入股票，并在另一个市场卖出以从价格差异中获利。