And I'm going to show you an example in a 1 second, just to drive this home, but notice the characteristics. In the first two cases, the problem reduced by 1 at each step.

在前面两个例子里,每一部问题的规模缩小了,不管是迭代的还是递归的，这表明这个问题的复杂性可能是线性的。

麻省理工公开课 - 计算机科学及编程导论课程节选

The problem is then that these were sold to low-income people, in many cases, who didn't understand what they were getting and that after two years the interest rate would reset up.

问题是贷款在一开始是发放给低收入人群,很多情况下,那些人并不理解这种贷款,或者说他们不知道利率在两年后会重设

耶鲁公开课 - 金融市场课程节选

Now, part of the problem is that the rating agencies were rating their securities that they were investing in as AAA, in many cases.

同时存在的一个问题是,信用评级机构对他们投资的,大部分债券都给予了AAA的评级

耶鲁公开课 - 金融市场课程节选