Realize in programming languages like C, there is a set of very well-defined rules, and this is in the recommended books.

同样，在像C语言这样的编程语言里，也有,一套非常明确的规则，这些都在推荐图书里面。

哈佛公开课 - 计算机科学课程节选

Although, I said, insurance was effectively discovered or invented in the 1600s, it has been slow to grow because they didn't have the well-defined-- all of the inventions yet.

尽管我说过，保险实际上,是在17世纪的时候被发现或者发明的，但它的发展非常缓慢,因为人们无法确切定义-,这种被发明出的东西。

耶鲁公开课 - 金融市场课程节选