第六步：移动硬盘使用完毕，点击屏幕右下角绿色的“安全移除硬件”按钮。
Click the green "Safely Remove Hardware" button on the lower right-hand side of your screen if you are done using your hard drive.
消费者会显式或者隐式地通知消息的使用完毕。
Consumers implicitly or explicitly acknowledge the consumption of a message.
在客人使用完毕后清洁耳机及替换耳机上的海绵套。
To clean the headset is clean and the headset sponge is being change after every guest use.
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