Finally, the advantage of the filtering approach based on obvious rules was proposed.
最后对三种算法从过滤效果,时间复杂度和灵活性方面进行了对比,阐述了基于显式规则的过滤算法的优越性。
参考来源 - 基于内容的客户端垃圾短信过滤系统的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Whereas Roosevelt knew who the enemy was and what America would have to do, Mr Bush had to choose and name an enemy in a new sort of war without obvious rules, aims or front-lines.
罗斯福知道自己的敌人是谁和美国必需采取怎样的措施去应对，但布什必须选择和指名敌人，而且新型的战争没有明显的规则、目标和前线。
There are no obvious rules for foot pressure and stitch density.
压脚压力及针迹密度无明显规律。
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