索引的层次和惟一性也会影响数据的访问速度。

The level and uniqueness of an index will also affect the speed of accessing data.

youdao

请注意这只会影响数据缓存（元组存储）且没有元数据缓存。

Please note this only affects data cache (tuple storage) and not metadata cache.

youdao

PHP 报表应用程序可以直接读取 XML，而不会影响数据的精度。

The PHP reporting application can read the XML directly, so it is not deprived of accurate data.

youdao

Again, I'm not expecting you to remember all the details of this but I'm going to show you this-- when you put all these things together, it's called the metabolic syndrome, and I'll show you some data on its impact on health.

同样的,我不要求大家记住这些细节,但我要告诉大家的是,当你把上面这些症状加在一起,这就是代谢综合征的表现,给大家看一些代谢综合征影响健康的数据

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选