Undercourse
底层, 垫层, 在花砖或瓷砖之下的底层
🗣️ 情景例句
I loved that place when we went on our honeymoon.
当初我们度蜜月时我便很喜欢那个地方。
The first step is the only difficulty.
万事起头难。
Bad luck! said Mother. It doesn't matter!
“真糟糕！”妈妈说，“没关系！”