Polyacetal
[化] 聚缩醛
🗣️ 情景例句
We also like to know
我们还想知道，
I've got an slight in my chest.
我的胸口有点痛。
The officers got out and the prisoner stood to attention and saluted as they passed.
军官们下了车，战俘立正站好，并在他们从他面前经过时敬了礼。