P.-p. substance
[医] 糙皮病预防物质
🧩 词语组成解析
🗣️ 情景例句
Experts say that a glass of red wine occasionally will do one's health a world of good.
专家说偶尔喝杯经酒对身体很有好处。
How much do you charge per unit?
你们每件要价多少呢？
I'm glad that you could see me today.
真高兴你今天能来。