Alternating current, direct current.

交流电，直流电。

youdao

The design is adapted for manufacturing various alternating current-direct current electromagnetic relays.

该设计适用于制造各种交直流电磁继电器。

youdao

Their job is to convert high-voltage alternating current from the mains into low-voltage direct current for mobile phones, laptops, iPods and other electronic gadgets.

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