这是很多年前的故事。在美国的波士顿附近有个名叫安比斯的小镇,小镇上居住的居民多数是黑人,小镇上有很多人每天早晨都要坐公交车去波士顿上班。公交车司机们有一个默契,有白人等车才会停下来,如果没有白人等车,他们则完全不理会等车的黑人。 This is a story many years ago. In the United States near Boston, there is a town called Ambise. The majority of the residents living in the town are blacks. Many people in the town go to Boston every morning by bus. Bus drivers have a tacit understanding that there are whites waiting for cars to stop. If there are no whites waiting for cars, they completely ignore the blacks waiting for the cars.