复合很重要。很多交通法规是可以轻微违反的。例如车速超过限速几公里每小时，或者经过停止标志时，不停车，而是减速都是可以的。
Compounding matters, many traffic laws can be broken just a little-say, driving a few miles per hour faster than the speed limit, or rolling slowly past a stop sign instead of coming to a halt.
顺序很重要，如果你的谓语以不同的顺序指定这些属性或在它们前罗列了其他属性，数据库就不会选择该复合索引。
The order is important because if your predicate specifies these properties in a different order or lists some other property before them, the composite index will not be selected by the database.
把你的系统与遗留应用、混搭和复合应用、以及云上复杂的Web服务集成起来是很重要的。
It's important to integrate your system with legacy applications, mash-ups and composite applications, and complex Web services in the cloud.
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