The real reason to switch them off is because they interfere with mobile networks on the ground, but somehow that doesn't sound quite so good.

需要关掉手机的真实原因是它们会影响地面上的移动通讯网络，只是这个理由不是那么动听罢了。

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Moreover, you may use this keyboard shortcut to quickly switch the sound on and off when working.

此外，你可以使用这个键盘快捷键来快速切换和关闭声音。

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The application will notify the user (with sound effects) when the battery is fully charged, hence it make the user to switch off the charger and thus it saves energy.

应用程序会通知用户（带声音效果）当电池完全充电，因此它使用户关掉充电器，从而可以节省能源。

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