Ifn
abbr. 干扰素（interferon）
🗣️ 情景例句
He is tough in doing everything.
他不管做什么事都很有毅力。
The eyes of the nation are upon the government.
国民的目光都注视着政府。
because this is easier to shape than other kinds.
因为燧石较之其他石头更容易成形。