When you buy high and sell low it's really hard to generate returns, even if you do it with great enthusiasm and great volume.

当你高价买入低价卖出时,是很难产生回报的,不管你有多大交易热情或有多大交易量

耶鲁公开课 - 金融市场课程节选

And so there was a dispute and the pharmaceutical company sued the South African government to try to prevent their buying the cheap generic, as they saw it, pirated version of an AIDS drug.

因此这存在着纠纷,制药公司起诉了南非政府,以阻止他们购买这些低价的非专利药，在他们看来，这些都是盗版的艾滋病药。

耶鲁公开课 - 公正课程节选