Undercourse
底层, 垫层, 在花砖或瓷砖之下的底层
🗣️ 情景例句
Nowadays more and more people are without jobs.
现在越来越多的人失业。
Have a nice Thanksgiving!
感恩节快乐！
Does he have a temperature, doctor?
他还发烧吗，医生？