其中的一个就是二轮机器人，在一段距离以外的使用者可以通过电池供电的耳机发出指令，无线遥控机器人。
One is a two-wheeled robot that can be moved forward by a user standing at a distance, who wears a battery-powered headset that transmits signals wirelessly.
孩子吞食的是一枚“纽扣”电池，一枚银色扁平碟状样的东西，是用来给遥控器，玩具，音乐贺卡，浴室秤及其它家用电器等供电的一枚电池。
The child had ingested a "button" battery, one of those flat silver discs used to power remote controls, toys, musical greeting CARDS, bathroom scales and other home electronics.
Pelican 是一种重量不到一公斤，依靠电池供电可以飞行二十分钟的遥控直升机。
THE Pelican, a small, remotely controlled helicopter drone weighing less than a kilogram, is powered by a battery that provides about 20 minutes’ flying.
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