He explains that as the water freezes, it produces heat,and the ice forms a protective blanket around the tree.

VOA: special.2010.01.12

Once you get that, once you get the value, "Christmas tree," as opposed to "red lights," "red lights" being perhaps a part of some Christmas trees, then you see that you're back in a semiotic system and a very obvious one, because a Christmas tree is a not-menorah, not-Kwanzaa candles.

一旦认识到这点，红灯，指的其实是圣诞树“,红灯是圣诞树的一部分，那么你会发现你回到了符号学的解释中，圣诞树不用于犹太教或者非洲人的节日。

耶鲁公开课 - 文学理论导论课程节选

Just as I thought that both the tree and I were going to fall, a hand touched me.

VOA: special.2009.11.15

In the president's motorcade, a vehicle carrying photographers collided with an ambulance as it traveled to the event, and was struck by a falling tree limb as it returned.

VOA: standard.2010.02.06

It parks in front of the Red Lion Inn. As in the original picture, there is a Christmas tree on the car as it is being delivered to a family.

VOA: standard.2009.12.25