Acetacetic acid
[化] 乙酰乙酸
🧩 词语组成解析
🗣️ 情景例句
How long will this letter take to get there?
这封信需要多长时间到那儿？
How could that be?
怎么可能有这种事？
It was my first flight. I was nervous when the plane took off.
我第一次坐飞机，起飞时我有点紧张。