a rechargeable battery with a nickel cathode and a cadmium anode; often used in emergency systems because of its low self-discharge rate是什么意思_a rechargeable battery with a nickel cathode and a cadmium anode; often used in emergency systems because of its low self-discharge rate在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句