And that does two things: bug one, it helps catch bugs in your code, and secondly it often converts it into a more efficient sequence of instructions before you actually go off and run it. All right?

这有两点好处：,第一是可以帮助你发现程序中的，第二是把你的代码,在运行之前,转换为更有效率的指令的集合，对不对？

麻省理工公开课 - 计算机科学及编程导论课程节选

He could run each sequence backwards and forwards, take it from the top, add, subtract.

ECONOMIST: Christopher Logue, poet, died on December 2nd, aged 85

During the Annefrank flyby, Stardust will run through the exact sequence planned for the comet encounter, with science instruments all running and relaying data at high speeds for the first time since the space probe's launch.

BBC: Probe set for asteroid flyby