P.-p. substance
[医] 糙皮病预防物质
🧩 词语组成解析
🗣️ 情景例句
In those days, when they made quilts.
那个时代 ，人们做被罩时，
What are your interests?
你的爱好是什么？
He showed that the average individual's sleep cycle is punctuated with peculiar bursts of eye-movements,
他指出，平常人的睡眠周期中不时伴有一阵阵奇怪的眼球队活动，