tray 2 empty 纸盘2空 ; 纸盒 ; 托盘2空
I ordered without looking at the menu and took my tray to a table where there was only one empty seat. I breathed a sigh of relief and began to eat.
我甚至没有看菜谱，胡乱点了几样，拿着我的盘子到只有一个空座位的桌子边坐下。
Once a tray is full, a special robot arrives to replace it with an empty one.
一旦托盘满了，就会有一个特殊的机器人过来取走并更换空的托盘。
Excuse me, but please empty your pockets of all the metal things and put them in this tray.
对不起，请您将口袋中所有的金属物品都拿出来，并将它们放到这个盘子里。
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