And it's hard to imagine a simpler program than this. So we very quickly realize that exhaustive testing is just never feasible for an interesting program.

更简单的程序了,因此我们很快的意识到,对一个程序来说详尽的,测试是永远不可行的。

麻省理工公开课 - 计算机科学及编程导论课程节选

When the people never used any chemicals, you know, they work hard on the field.

那时候，人们从来不用任何化学品，而是在田地里辛勤劳动。

问上门厨师 - SpeakingMax英语口语达人