Where do you see a bridge? 你在哪儿看到桥了？

　　A bridge usually carries people between two places over water. 桥通常是人们往来于水流两岸的枢纽。

　　A long time ago, bridges were made with logs or stones, so they could not hold strong things. 很久以前，桥是由木头和石头构成的，所以它们承受不住重的东西。

　　However, these days, bridges have become much longer and stronger. 但是现在，桥比之前长了，也更坚固了。

　　Do you know what the longest bridge in the world is? 你知道世界上最长的桥是什么桥吗？

　　It is Lake Pontchartrain Causeway Bridge in Louisiana, U.S.A. 世界上最长的桥是美国路易斯安那州的庞恰特雷恩湖铜锣桥。

　　It is about 38 kilometers long. 它长约38公里。