Heavy rains and flooding in states up river in the past week, are exerting enormous pressure downstream.

VOA: standard.2010.05.09

Because in doing that, Python would then have a value that it could pass on into some other part of a computation, and if it wasn't what I wanted, I might be a long ways downstream in the computation before I actually hit some result that makes no sense.

因为如果这样做的话，Python会将,输入的值传递到下面的,一些运算中去，如果这个值的类型不是我想要的，我可能会在得到,一个毫无意义的结果之前,经历一个很长时间的,计算过程。

麻省理工公开课 - 计算机科学及编程导论课程节选

Russians were awoken to the threat posed by the destruction of a hydroelectric plant last year, when a major accident at the Sayano-Shushenskaya dam in Siberia threatened the lives of millions of people downstream.

VOA: standard.2010.07.21