Acetylketene
[化] 双烯酮
🗣️ 情景例句
What's the deadline for claim?
索赔的有效期多长？
You know that some countries are selling this kind of products at cheap prices in large quantities.
您知道有的国家对这种商品正在削价抛售。
Now, this is the chemistry lab. Have you been in this lab before?
好啦，这是化学实验室。你们以前到过这个实验室吗？