1、To compare, Nissan's new electric car, the Leaf, comes with a 24 kilowatt-hour battery.
以日產(chǎn)公司的新型電動(dòng)汽車做比較，Leaf汽車只配有24千瓦的電池。

2、For one kilowatt-hour of electricity, which is four million joules, I pay only a lousy ten cents.
為一千瓦時(shí)電，就是四百萬(wàn)焦耳，我只花區(qū)區(qū)10美分。

3、Coal typically produces almost twice as much carbon dioxide per kilowatt-hour as natural gas.
通常來(lái)講，煤生產(chǎn)每千瓦時(shí)產(chǎn)出的二氧化碳約為天然氣的兩倍。

kilowatt-hour翻譯