Look at people in the street, and you will notice many differences. But look again and see if you can spot the similarities-such as the way people shrug their shoulders, frown when they are thinking, wave good-bye, or laugh at a joke. You will see behavior like this all around the world.

看路上的人们，你会发现有很多不同。但当你再看一遍，你就会找到相同之处——人们耸肩的方式，思考的时候皱眉头，挥手说再见，或是因一个笑话发笑。你会在世界各地看到类似这样的举止。