电池电压太低了！

Battery voltage is too low!

youdao

第一只LED的电路导通时的电池电压量太低。

The first simply circuit turns on an LED when the battery voltage gets too low.

youdao

第一只LED的电路导通时的电池电压量太低。

The first simply circuit turns on an LED when the battery voltage gets too low.

youdao