To close all doors and block all openings, signifying strict precautions or thorough defense.
为了防范冷空气进入，他们闭门塞户，屋内暖和得很。
To prevent cold air from entering, they closed their doors and blocked all openings, making the room very warm.
Next Idiom
To close all doors and block all openings, signifying strict precautions or thorough defense.