P.-p. factors
[医] 抗糙皮病因子, 抗蜀黍红斑因子, 烟酸
🧩 词语组成解析
n. 因素（factor的复数）
🗣️ 情景例句
Hi, Pop. Hi, Son.
你好， 爸。你好 ，儿子。
This professor has put all of his students to sleep except two.
这位教授使得除了两人以外的所有学生都入睡了。
After being absent from the Gables for a week,
一次，姑妈有一个星期没在“山墙庄园”住。