Procomplementary factors
[医] 前补体因子
🧩 词语组成解析
n. 因素（factor的复数）
🗣️ 情景例句
You can't take her promises seriously, she never keeps her word.
她答应的事不用当真，她说话从来不算数。
It is convenient to know the language.
掌握这门语言会带来方便。
No, they aren't. They're their books.
不，不是我的。这些是他们的书。