lower layer

• 底层

lower layer的用法和样例：

例句

1. The lower story of the building was cased with marble.
   大楼底层的外墙砌上了一层大理石。
2. Spread the quark cream on the bottom layer and cover with the almond top.
   晾凉后蛋糕底分两层，底层铺上乳酪奶油糊，盖上杏仁层。