For instance, when first purchased, the system may last for 2 hours on a fully charged battery, but after three months it only seems to last for 1 hour.是什么意思_For instance, when first purchased, the system may last for 2 hours on a fully charged battery, but after three months it only seems to last for 1 hour.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句