Where a step is a comparison or an arithmetic operation.

第一步肯定是比较,或者进行某种算法的操作。

麻省理工公开课 - 计算机科学及编程导论课程节选

In the book business, there's something difficult about maintaining an independent operation.

在书店行业里,要想保持独立的经营模式,还是有些困难的

耶鲁公开课 - 金融市场课程节选