Dialin
二氢化萘
🗣️ 情景例句
My dautghter Cami lives in New York.
我女儿 Cami住在纽约。
All our work was in vain.
我们白干了一场。
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。