battery save mode
省电模式
以上为机器翻译结果，长、整句建议使用 人工翻译 。
If set to SAVE, the sensor goes into a standby sleep mode saving battery power.
如果设置为保存，传感器进入待命休眠模式节省电池电量。
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It's designed to tell when you're actually looking at your screen, keeping its sleep mode from kicking in when you are and shutting down to save battery life when you're not.
CNN: Hands-off with the Samsung Galaxy S IV
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