圣诞节卡片制作，你们怎么庆祝圣诞节？通过互相送卡片。
How do you celebrate Christmas? Through send CARDS to each other.
事实上，“150张圣诞节卡片，这是你发卡片的人的平均数”。登巴说。
In fact, 150 is "the average number of people to whom most of you send Christmas CARDS," Dunbar says.
离圣诞节还有两天，大卫想给他班上的每个人发一张卡片。
It was two days before Christmas, and David wanted to give a card to everyone in his class.
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