Poly(ether-ketone)
[化] 聚醚酮
🗣️ 情景例句
How long is it going to take for me to get there?
到那里还需要多久时间
Why didn't you say so?
为什么不早说？
They teach us Chinese and we teach them English. Please write soon!
他们教我们汉语，我们教他们英语。请赶快回信。