A.f.c.
自动频率控制
🗣️ 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 always forgets to wash behind his ears.
他总是忘记洗耳朵后面。
Are you a teacher?
你是教师吗？