你知道是爱迪生发明了蜡纸、火警警报器、电池和电影吗？
Did you know Edison invented wax paper, fire alarms, the battery and motion pictures?
你知道是爱迪生发明了蜡纸、火警警报器、电池和电影吗？
Did you know Edison invented wax paper, fire alarms, the battery, and motion pictures?
你知道是爱迪生发明了蜡纸、火警警报器、电池和电影吗？
Did you know Edison invented wax paper, fire alarms, the battery, and motion pictures?
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