Monosulfide
一硫化物
🗣️ 情景例句
I think I've got them all, but I'm not sure.
我想我都已经拍齐了， 但我不能肯定。
Is the distribution of wealth uneven in your country?
在你们国家财富分配得均匀吗？
She heard the front door open and heavy footsteps in the hall.
她听见前门被打开，走廊里响起重重的脚步声。