“事件”本身是一个抽象的概念，也是一个对象， 它是表现另外的对象状态变化的对象。日常生活中,“事件”随处可见 ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible resultsSome results have been hidden because they may be inaccessible to you
Show inaccessible results