Metacetonic acid
[化] 丙酸
🧩 词语组成解析
🗣️ 情景例句
Eight straight-back chairs. Thirty folding chairs.
八张直背椅。三十张折摺椅。
Do you have any idea on this subject?
对于这个题目你有什么看法？
and by the time he is grown and able to take part in its activities,
等他长大了，能做各种事了