submarine sandwich
noun [ C ] US uk/ˈsʌb.mə.riːn ˌsæn.wɪdʒ/ us/ˈsʌb.mə.riːn ˌsæn.wɪtʃ/ (informal sub)
潜艇三明治（内夹色拉、冷切肉或奶酪的长条形面包）
a long, thin loaf of bread filled with meat or cheese, and often lettuce, tomatoes, etc.
Synonyms: hero (FOOD) hoagie