It does not allow interception of events targeted to the capturer's ancestors, its siblings, or its sibling's descendants. 它并不允许定位在捕捉者的父节点，同级节点或者同级节点的子节点上的事件被拦截。
We have history books recording past events, geography books dealing with the earth, mathematics books focusing on space and numbers. 历史书记录了发生过的事件，地理书定位在地球，数学书定位在空间和数字。
