this is perhaps the most interesting thing because it forces us to show the complexity, to see the complexity, of semiotic relationships: a red light, just to return to the Christian holiday, a red light on a Christmas tree.

现在我们讲到了一个耐人寻味论点,这个问题迫使我们要思考，符号系统之间复杂的联系：,当我们再圣诞节时看到红灯，圣诞树上的红灯。

耶鲁公开课 - 文学理论导论课程节选

You will have your own favourites, but I always liked the Traffic Light Tree in London's Docklands, a bewildering display of red, amber and green which kept me waiting, transfixed and tense, for really quite some time when I first encountered it.

BBC: Sheep on Shoreham roundabout

If Wright does step up to fight Hopkins, colourful Ugandan Kassim Ouma could rise to the top of the light middleweight tree.

BBC: SPORT | Boxing | Boxing 2005 - Rest of the world

This is what you will listen to while you watch jolly old Al Roker light that Christmas tree tonight.

FORBES: Rocking Around the Alternative Christmas Tree