Polyhydroxyketone
[医] 多羟酮
🗣️ 情景例句
Isn't it exciting, Grandpa?
真令人兴奋， 是吗， 爷爷？
She sent me a Christmas card last year.
去年寄过一张圣诞卡。
Yes, he did.He telephoned at nine o'clock.
是的，打了。他在9点钟又打电话。