Polystichinol
耳蕨醇
🗣️ 情景例句
My computer was infected by a virus, I guess since I didn't have firewall installed.
我的电脑受到病毒感染了，我想是因为我没装防火墙。
He has pamphlet.
他有一本小册子。
May I use your pen?
我可以用你的笔吗？