Acetacetic acid
[化] 乙酰乙酸
🧩 词语组成解析
🗣️ 情景例句
I see how people spend their leisure time--
我看到人们怎样利用闲暇时间
What time are you coming back?
你什么时间回来？
A short time before, great trees had covered the countryside for miles around.
就在不久之前，参天大树还覆盖着方圆数英里的土地。