If you put meat, vegetable, cheese or other foods between two pieces of bread, you will have a sandwich.

如果你把肉、蔬菜、乳酪或其他食物放在两片面包之间，你就得到了一份三明治。

youdao

He put the meat between two pieces of bread and holds the food in his left hand while he plays CARDS with his right hand.

当他在用右手玩牌类游戏的时候，他就把肉放在两片面包之间，然后用左手拿着。

youdao

But in 1885, he had an epiphany: If he put the meat between two pieces of bread, people could walk around holding it.

BBC: Is this the original hamburger?