云南开放大学计算机专业英语第四次离线作业

请把以下内容翻译成中文：

1、The term “optimization” in compiler design refers to the attempts that a compiler makes to produce code that is more efficient than the obvious code
2、We need a good understanding of the behavior of programs to start with and thorough experimentation and evaluation to validate our intuitions
3、The optimization must improve the performance of many programs.