Polyacetals
聚缩醛(树脂)
🗣️ 情景例句
when is your plane reservation for your flight to Athens?
飞Athens订的是什么时候的班机？
I'm too nervous.
我太紧张。
How interesting! said Ann. It makes me feel thirsty!
“真有趣！”安说，“都让我觉得口渴了！”