Monosulphide
一硫化物
🗣️ 情景例句
Is this your first trip to China?
这是你第一次到中国吗？
Did you go to the theater this morning?
你今早去戏院了吗？
But mine are better than yours. Look! Yours are green, and quite small.
但我的比你的好。瞧！你的是青的，而且很小。