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这不是高科技,小到纽扣电池、大到外接电源,电力驱动它们为人和狗狗服务,而且,这是即便充电也不会爆的电子时代!
This is not high tech, as small as a button battery, large external power supply, power-driven service for dogs and dogs, and this is an electronic age that will not explode even if charging!