翻译一段英文~~~~~~~~~~鄙视机翻

翻译一段英文~~~~~~~~~~鄙视机翻
Yellow has very special meaning in America, where family members pin a yellow ribbon on the door or tie it on the tree when they expect their loved one to come back home. On the roads, the color yellow is used to mean caution. Policemen in the street wear yellow color vests to warn vehicles of their presence. Besides, a yellow line painted on the middle of the road tells the drivers not to cross into the opposite lane.
注意：A.翻译原文 B.找出短语,并翻译短语.

在美国,黄色具有特殊的意义,家里人会钉一根黄色的丝带在门上或者绑一条在树上当他们期待他们所爱的人回家.在马路上,黄颜色用于代表警戒.在街上警察穿黄色的背心来警告车辆的现在位置.另外,路中间漆了一条黄色的线来告诉司机们不要开进相反的车道.
warn...of 警示(谁)（什么东西）