layer of oil molecules

例句：

1. 1. The cake was layered with chocolate and nuts.
   蛋糕被巧克力和坚果层层覆盖。
2. 2. The book is divided into several layers of information.
   这本书被分成了几个信息层次。
3. 3. He slammed the door shut, leaving no layer of explanation between them.
   他猛地关上了门，在他们之间没有解释的层次。