随着手电筒的电池渐渐耗尽，光线也越来越微弱。
The light from the flashlight became fainter and fainter as it ran out of battery.
youdao
当电池是低的，手电筒会自动关闭。
When the battery is low, flashlight will turn off automatically.
我希望你多带了一只手电筒或备用电池。
I hope you brought another torch or a spare battery.
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