单词open sandwich
n.: 单片三明治（无顶层面包片）
网络: 开口三明治；开放式三明治；敞口三明治
单片三明治（无顶层面包片）:
a sandwich which is served on a plate with no top piece of bread
I order a big fat open sandwich with ham and cheese and masses of salad.
我点了一份夹着厚实火腿及奶酪的单片三明治以及一大盘沙拉。
Two Models of Analogy Sandwich Plate Analysis for Open-Sandwich Plate
空腹夹层板连续化分析的两种模型