Metaacetaldehyde
三聚乙醛
🗣️ 情景例句
What college are you attending?
你在哪里上学？
Mr. Wang is not in now.
王先生现在不在此地。
They are working hard on the farm. The children are picking apples.
他们正在农场卖力地干活。孩子们在摘苹果。