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
I think I'm falling asleep.
我想我要睡着了。
What were you doing when I called?
我打电话给你时你在干吗？
By the way, where are you going now?
顺便问一句，你现在去哪里？