1. Aspect
切面 : A modularization of a concern that cuts across multiple classes(多个类的模块化横切关注点)
2. JoinPoint
连接点: A point during the execution of a program(程序执行期间的一个点)
3. PointCut
切点: A predicate that matches join points. (匹配的连接点)
4. Target Object
目标对象
5. Weaving
织入
linking aspects with other application types or objects to create an advised object (连接切面和目标对象用来创建增强对象的过程)