Returning FALSE continues the normal event handling.
返回FALSE继续正常的事件处理。
OS X provides automatic support for reporting gestures to your app through the normal event-handling mechanism;
OSX通过事件处理机制，自动向你的应用报告手势变化；
If you try to serialize your object with a normal event, serialization will fail because the storage backing the event isn't serializable.
如果你试图通过一个普通事件来序列化你的对象，序列化就会失败，这是因为备份该事件的存储是不可序列化的。
Whenever the source object lifetime extends beyond the object lifetime of the listener, the normal event pattern leads to a memory leak: the listener is kept alive longer than intended.
如果源对象生存期超出了侦听器的对象生存期，则常规事件模式会导致内存泄漏：侦听器保持活动状态的时间比预期要长。
Whenever the source object lifetime extends beyond the object lifetime of the listener, the normal event pattern leads to a memory leak: the listener is kept alive longer than intended.
如果源对象生存期超出了侦听器的对象生存期，则常规事件模式会导致内存泄漏：侦听器保持活动状态的时间比预期要长。
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