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The orange is a fruit. / The orange is a kind of fruit. 橘子是一種水果。　　

The orange and the apple are fruit. / The orange and the apple are kinds of fruit. 橘子和蘋果是水果。　　

The hamburger is food. / The hamburger is a kind of food. 漢堡包是一種食物。　　

The hamburger and chips are [is] food. 漢堡包和薯條是食物。