Underlayment
n. 地毯衬,屋面衬垫材料
🗣️ 情景例句
Did you hear the news?
你听说那条新闻了吗？
I know the boy whose father is a policeman.
我知道那个男孩的父亲是警察。
But none of them has been turned to stone yet!
但到目前为止还没有一个变成石头呢！