14 Skyscrapers

Skyscrapers written by John Lockyer

约翰·洛克耶的《摩天大楼》

Skyscrapers are very tall buildings. They are built in cities that don't have much land for low buildings. cranes Many people work and live up high in skyscrapers. Big cranes are used to build them.

摩天大楼是非常高的建筑。 它们建在没有太多土地建造低层建筑的城市里。 许多人在摩天大楼的高层工作和生活。 大型起重机被用来建造它们。

Most tall buildings were made of stone before there were skyscrapers. Stone is heavy, so the tallest buildings didn't have many floors.

在摩天大楼出现之前，大多数高楼都是用石头建造的。 石头很重，所以最高的建筑没有很多楼层。

People could build taller buildings when steel was invented. These buildings had a steel frame and the walls were made of bricks. The first skyscrapers that were made from steel and bricks had ten floors. They were much lighter than stone buildings.

钢铁发明后，人们可以建造更高的建筑物。 这些建筑是钢结构的，墙是砖砌的。 第一批用钢和砖建造的摩天大楼有十层。 它们比石头建筑轻得多。

People wanted to build even taller skyscrapers, but the wind was a problem. When the wind blows hard, the skyscrapers can move and bend.

人们想建造更高的摩天大楼，但风是个问题。 当风刮得很大时，摩天大楼可以移动和弯曲。

To stop the skyscrapers from bending, steel beams were put up through the middle. This made the building strong. It was a good place to put an elevator, too. Then everyone in the building could get up and down the floors without using the stairs.

为了防止摩天大楼弯曲，在中间架起了钢梁。 这使建筑物坚固。 这也是一个安放电梯的好地方。 这样大楼里的每个人都可以不用楼梯就能上下楼了。