Pentanoic acid
[化] 戊酸
🧩 词语组成解析
🗣️ 情景例句
a portrait of the United States--
一幅美国的剪影--
I'm going to show him how to write.
我正要指点他如何写字。
All gun-ports were open and the muzzles peeped wickedly from them.
船上的炮眼都开着，炮口虎视眈眈地向外窥视着。