Undercourse
底层, 垫层, 在花砖或瓷砖之下的底层
🗣️ 情景例句
Sorry to be a pest.
不好意思打扰你。
He was out of his mind with grief.
他伤心得精神错乱了。
I'm sorry. I think I dialled the wrong number.
对不起。我想我拨错了号码。