德国哲学家歌德曾言：理论是灰色的，实践之树常绿。
Germany philosopher Goethe Zeng Yan: Theory tree of being gloomy, putting into practice is evergreen.
一位发言人说：“如今许多家庭会在家里不同的房间里、甚至是屋外摆放两棵或更多的圣诞树。”
A spokesman said: "Many households now display two or more Christmas trees in different rooms of the home and even outdoors."
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