Hopping over an unfinished wall, the boy touched a big electric transformer.
的墙时，他触到了一个大号变压器。
Power transformer is one of the most important equipments in the electric system.
电力变压器是电力系统中最重要的电气设备之一。
Power transformer is one of the most important equipments in the electric system.
电力变压器是电力系统中最重要的电气设备之一。
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