18 Fast Changes on Earth

Fast Changes on Earth by REYNA EISENSTARK

《地球的快速变化》作者:莱娜·艾森斯达克

Chapter 1 Fast Changes on Earth Look outside. It probably looks as it did yesterday. This is because most changes on Earth happen slowly. There are fast changes on Earth, too. A bad storm can come out of nowhere. A small stream can grow into rushing water. We don't always know when fast changes will happen.

第一章地球的快速变化向外看。 它看起来可能和昨天一样。 这是因为地球上的大多数变化都发生得很慢。 地球上也有快速的变化。 一场大风暴可能凭空而来。 涓涓细流也能汇成滔滔江水。 我们并不总是知道什么时候会发生快速的变化。

Chapter 2 Fast Water Have you ever filled a sink with too much water? If the water spilled over, there was a flood. A flood is when water overflows. It can happen during a heavy rain. It can happen when snow melts too quickly. Some floods cause damage. They tear down trees. They harm buildings and people, too.

你是否曾经在水槽里灌了太多的水? 如果水溢出来，就会发生洪水。 洪水就是水溢出来。 它可能在大雨中发生。 当雪融化过快时就会发生这种情况。 有些洪水会造成破坏。他们砍伐树木。 它们也会伤害建筑物和人。

Chapter 3 Twister! Many storms bring rain and wind. Sometimes they cause tornadoes. A tornado is a fast, spinning cloud of air. It is also called a twister. Tornadoes are wide at the top and thin at the bottom. Tornadoes have very strong winds. In 1999, one tornado after another hit Oklahoma. They were the strongest tornadoes ever!

第三章龙卷风!许多暴风雨带来了雨和风。 有时它们会引起龙卷风。 龙卷风是一种快速旋转的空气云。 它也被称为龙卷风。 龙卷风上宽下薄。 龙卷风有很强的风。 1999年，一个又一个龙卷风袭击了俄克拉荷马州。 它们是有史以来最强的龙卷风!

Chapter 4 Shaky Cround If the ground under you starts to shake, it could be an earthquake. Scientists want to learn all about earthquakes. Most earthquakes do not last long. But they can be dangerous. In 1906 an earthquake destroyed most of San Francisco. It lasted for only 50 seconds!

第四章摇晃的地面如果你脚下的地面开始摇晃，那可能是地震了。 科学家们想了解有关地震的一切。 大多数地震持续时间不长。 但它们可能很危险。 1906年，一场地震摧毁了旧金山的大部分地区。 它只持续了50秒!