Translation of "Tray" in Chinese

Students can take as much food as they want, but there isn’t a tray to pile it onto.

学生可以按需所取，但不提供餐盘

You have a tray that's 14-by-18 inches and you feel you need to load it up with food.

你有个14×18英寸的餐盘， 你就会很想装满食物