Monosulfide
一硫化物
🗣️ 情景例句
You're making the game harder.
你使游戏变难了。
By reading we enrich the mind; by conversation we polish it.
读书可以使我门的思想充实，谈话使其更臻完美。
He used to learn everything by rote.
他过去总是死记硬背。