Monosulphide
一硫化物
🗣️ 情景例句
No way. I must get everything ready before noon.
不行啊，我必须在中午前把一切都做好。
Youth looks forward and age backward.
青年人向前看，老年人向后看。
We are prepared to reconsider amending the contract.
我们可以重新考虑修改合同。