Because code may be changed by an aspect, unit tests that run perfectly on a class may behave quite differently when the class is integrated into an AOP system.
由于代码可以被某一个方面所改变，在一个类上可以完美运行的单元测试当这个类被集成入一个AOP系统中可能会出现完全不同的运行状况。
One of the key aspects of the system architect's role is to weigh up conflicting requirements and decide on a solution, often by trading off one aspect against another.
系统架构师角色关键的一方面就是衡量相互冲突的需求、决定解决方案，常常要牺牲一个方面来换取另一个方面。
The second aspect of the (CF) system collects information on what kind of content and commentary you like and dislike, and based on your submission and voting habits, it does user-data-profiling.
协同过滤系统的第二个效果是收集的信息是基于哪种内容、你喜欢还是不喜欢的评注，并根据您提交并参加投票的习惯，这些正是用户数据概况。
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