在一个优化编译器中，优化可分为机器无关优化和机器相关优化。
In an optimizing compiler, the optimization can be divided into two categories: machine-independent optimization and machine-dependent optimization.
然后在一个优化准则下将这些线进行配对，使得他们在丢失区域里能够平滑的连接。
Match them into pairs in an optimization criterion, then they can connect each other in the missing area smoothly.
在一个优化的网站上，这个磁盘卸载文件会完全存储在文件系统缓存中，它位于RAM之外。
In a well-tuned site, this disk offload file fits entirely into the file system cache, and is served out of RAM.
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