The device is attached to a water bottle, and it monitors the clarity inside the bottle, blinking when the light is obstructed by particles.
这种装置放在水瓶上，用来检测瓶子内部的透明物，一旦光线被杂质阻挡了，它就会闪烁。
The device is attached to a water bottle, and it monitors the clarity inside the bottle, blinking when the light is obstructed by particles.
这种装置放在水瓶上，用来检测瓶子内部的透明物，一旦光线被杂质阻挡了，它就会闪烁。
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