两个信号处理器被连接起来——一个用来在用户关闭窗口时退出应用程序，另一个用来在用户点击按钮时，修改显示的欢迎信息。
Two signal handlers are connected — one to quit the application when the user closes the window and another to change the greeting that is displayed when the user clicks the button.
当扩展服务因为扩展周期而关闭时，新的功能旗帜被取消激活将会禁用上传按钮同时／或者显示关于关闭时间更为有帮助的消息。
When the external service is down for extended periods, a feature flag can be deactivated that would disable the upload button and/or show a more helpful message about the downtime.
当只是瞬间按下OFF按钮时，时钟显示不关闭并会引起电池损耗。
When you press off only momentarily, the clock display does not turn off and this causes battery wear.
当相机的AF - ON按钮按下后显示屏关闭并且可以用多选择器选择对焦区域。
When the camera's AF-ON button is pressed, the monitor turns off and a focus point can now be selected using the multi selector.
当相机的AF - ON按钮按下后显示屏关闭并且可以用多选择器选择对焦区域。
When the camera's AF-ON button is pressed, the monitor turns off and a focus point can now be selected using the multi selector.
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