Tersulfide
三硫化物
🗣️ 情景例句
Dr. Lee's office.
李医生诊所。
I have no idea what they're going to say, so I'll have to play it by ear.
我一点不知道他们将会说些什么，所以我只好见机行事。
Being a mother is not easy.
做一个母亲是不容易的。