Ifn
abbr. 干扰素（interferon）
🗣️ 情景例句
Sit down. Sit down.
请坐。请坐吧。
Don't jump to conclusions.
别过早下结论。
So archaeologists have neither history nor legends to help them to find out where the first 'modern men' came from.
于是，考古学家们既缺乏历史记载，又无口头传说来帮助他们弄清最早的“现代人”是从哪里来的。