Levulic acid
[化] 3-乙酰丙酸; 4-氧代戊酸
🧩 词语组成解析
🗣️ 情景例句
It's us, Susan.
是我们， Susan。
Conversation makes one what he is.
言如其人。
They also have the disadvantage of being an expensive form of transport.
飞机另一个缺点是昂贵。