open sandwich
noun [ C ] UK uk/ˌəʊ.pən ˈsæn.wɪdʒ/ us/ˌoʊ.pən ˈsæn.wɪtʃ/ (US open-faced sandwich)
单片三明治,外馅三明治
a single slice of bread with various types of food, such as cheese or cold meat, on the top
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