All right? The first one is, that test has to involve-- shouldn't have to, the value of some variable.

好不好？第一件事是，循环开始的测试必须必须-不是一定，一些变量的值。

麻省理工公开课 - 计算机科学及编程导论课程节选

Oil, bonds, and stocks are all independent-- somewhat independent--they're not perfectly independent, but they're somewhat independent and, to the extent that they are, it lowers the variance.

石油，债券和股票都是互相独立-,一定程度上独立，不是绝对的独立，但一定程度上独立，可以使方差值变小，降低风险。

耶鲁公开课 - 金融市场课程节选

At that time t, the x coordinate must have a certain value.

在该时刻,x 坐标一定是个确定的值

耶鲁公开课 - 基础物理课程节选