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The ancient Maya people lived in the south of Mexico and Guatemala 1,200 years ago.
1200年前，古玛雅人生活在墨西哥的南部和危地马拉。
Maya people still live there today.
玛雅人今天仍然居住在那里。
Archaeologists are looking for the roads and buildings of the ancient Maya people.
考古学家正在寻找古玛雅人的道路和建筑。
A new machine using lidar is helping them find the remains of old Maya towns and villages.
一台使用激光雷达的新机器正在帮助他们寻找古老的玛雅城镇和村庄的遗迹。
Marcello Canuto is a National Geographic Explorer.
马塞洛·卡努托是国家地理探险家。
He says that it is difficult to look for the remains in the forest, but with lidar, they can now see the shapes of buildings and roads under the trees.
他表示，很难在森林中找到遗迹，但有了激光雷达，他们现在可以看到树下建筑物和道路的形状。
Did the archaeologists learn anything new from the lidar machine?
考古学家们从激光雷达上获悉了什么新内容吗？
Yes, they did. They believed that the ancient Maya people lived in small houses in small villages, but the lidar pictures changed their ideas.
是的，他们做到了。他们之前认为古代玛雅人住在小村庄的小房子里，但激光雷达图像改变了他们的想法。
They showed a lot of vllages and cities. Marcello thinks that between five and ten million people lived in the area.
激光雷达图像展示了许多村庄和城市。马塞洛认为，曾有500万到1000万人居住在该区域。
The ancient Maya people didn't have electricity or horses to help them to carry things, but they built a lot of villages and cities.
古玛雅人没有电，也没有马匹来帮助他们搬运东西，但他们建造了许多村庄和城市。
All these people needed food and water, so there were a lot of farms to grow food and roads to transport it to the cities.
所有人都需要食物和水，所以有很多农场用来种植食物，并通过很多道路将食物运送到城市。
They were some of the largest cities in the world at the time!
那些城市的规模是当时世界上最大的！
