可基于该信息对事件进行向下类型转换。

This information can be used as the basis for downcasting the event.

youdao

此外还有几种方便的方法可用于向下类型转换。

Finally, several convenience methods can perform the downcast.

youdao

此外还有几种方便的方法可用于向下类型转换。

Finally, several convenience methods can perform the downcast.

youdao