Emergency generator
[化] 备用发电机
🧩 词语组成解析
🗣️ 情景例句
He said they need a new book of photographs,
他说他公司需要一本新的摄影集，
Who has never tasted bitter, knows not what is sweet.
不尝黄连苦，怎知蜂蜜甜。
only of metal, which wears away by friction.
而是由金属组成，而金属可以随着磨擦而磨损殆尽。