If, during the widget lifecycle, some connections are not needed any longer, the implementer can manually disconnect them by calling the disconnect method to reduce the event handling.
如果，在小部件生命周期内一些连接已经不再需要，那么实现者就可以通过调用disconnect方法来手动断开这些连接以减少事件的处理。
If, during the widget lifecycle, some connections are not needed any longer, the implementer can manually disconnect them by calling the disconnect method to reduce the event handling.
如果，在小部件生命周期内一些连接已经不再需要，那么实现者就可以通过调用disconnect方法来手动断开这些连接以减少事件的处理。
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