Vacual
真空的, 近于真空的
🗣️ 情景例句
My father is an engineer of a construction company, and mother is a doctor.
我父亲是一家建筑公司的工程师，母亲是一名医生。
The roof has leaks in it,and the front step need to be fixed.
房顶有漏缝，并且前面台阶需要修理。
I tried to say something, but my mouth was full of cotton wool.
我想说点什么，但我嘴里塞满了药棉。