P.-p. substance
[医] 糙皮病预防物质
🧩 词语组成解析
🗣️ 情景例句
No. Thank you. I have a dinner date.
不 谢谢。我要去赴晚餐约会。
What will it be after the clear weather?
晴天以后天气会怎么样？
Then he spoke slowly, but I could not understand him.
于是他说得慢了，可我还是听不懂。