【電】 a-b power pack

甲的英語翻譯：

armour; first; nail; shell
【醫(yī)】 carapace; concha; conchae; helo-; nail; onycho-; onyx

乙的英語翻譯：

second
【建】 acetonitrile; ethane nitrile

電源的英語翻譯：

electrical source; power source; power supply
【計】 power source; power supply; PS; supply power
【化】 current source; electric source; power source; power supply
supply source