They farm tilapia - mostly in China. Sporns says the U.S.has an international certification process that is rigorous and will catch potential problems.

VOA: standard.2010.05.27

Now to make that lower-of-the-two-prices comment a little bit more rigorous, let's figure out what the demand actually is for these firms.

为了说明两者价格较低者,具体是什么意思,先来解决这些公司真正的需求量是什么

耶鲁公开课 - 博弈论课程节选

He was beginning to join ranks with those early seventeenth-century English Protestants who imposed upon themselves rigorous and strict codes of behavior and self-denial, and who were increasingly being called by their enemies Puritans.

他要开始加入,17世纪早期英国新教徒的行列,那些人把严格的行为准则和自我否认,强加到自己身上，还不断被敌人称为清教徒。

耶鲁公开课 - 弥尔顿课程节选

Depends on--I don't want to be too rigorous about that because you could imagine the other way around, but if you talk to managers this sounds more realistic, at least for retail goods like Coke and Pepsi.

这方面我不想太绝对,因为你们可能会想象其他的情形,但如果你们和那些经理谈过,现在的模型会更贴近现实,至少对于可乐这样的零售产品而言

耶鲁公开课 - 博弈论课程节选