Polyacetaldehyde
聚乙醛
🗣️ 情景例句
Richard, if you go out
Richard，假如你去
I'd like to have a seat by the window.
我要一个靠窗的座位。
He tried to escape but was followed and caught.
他曾经试图逃跑，但是被人追上来抓住了。