重点讲解：
1. start out 从…开始；从…着手；
例句：You would have to start out differently.
你必须有一个不同的开始]]7S&5A^&Gwyef=。
2. turn out 原来是；结果发现；
例句：The result will definitely turn out to be just the opposite of their wish.
其结果必然不会像他们所一厢情愿的那样，而只能适得其反__y*5i9WxIP+!mASeGr。
3. compared to 与…相比；和…比起来；
例句：It sounds difficult, but compared to full-time work it was a cinch.
这听上去有难度，可是比起全职工作来，就是小意思了L@&xoi&Dy@。
4. slow down (使)放慢；(使)减速；
例句：So, indexes speed the process of retrieval but slow down modification.
因此索引加快了检索过程的速度，但减慢了修改的速度qUYeZ;nCv^8oN。