聚会上最受欢迎的是一大盘七层沙拉，里面有蔬菜、鸡蛋、奶酪和其他配料。

The most popular dish at the party was a big bowl of ___seven-layer salad with vegetables, eggs, cheese, and other ingredients.

网络工程师需要理解七层模型的每一层功能。

Network engineers must understand the functions of each ___seven-layer model.