Disasters灾难

Earthquakes are caused by forces deep within the earth.地震是地球深处的力量引起的

When the earth shakes, buildings can collapse, and people can be buried inside. 当地球震动时，建筑物可能倒塌，人们可能被埋在里面。

An explosion is a rapid, violent release of energy.爆炸是一种快速,猛烈的能量释放。

Explosions can be caused by chemical reactions, such as inside an engine. 爆炸可能由化学反应引起，比如发动机内部的化学反应。

A spark can ignite mixture of gases, and release energy for good or destructive purposes. 火花可以点燃混合气体，并释放能量以达到好的或破坏性的目的。

Accidents are often caused by people doing foolish things, or by not being careful. 事故经常是由人们做蠢事，或不小心引起的。

One major cause of accidents is driving too fast. 交通事故的一个主要原因是开车太快。

Accidents with fire can be very serious and can result in very painful injuries. 火灾事故可能非常严重，可能导致非常痛苦的伤害。

Epidemics are the rapid spread of disease such as the flue or Ebola. 流行病是指如流感或埃博拉等疾病的迅速传播。

Throughout history, epidemics have killed millions of people. 纵观历史，流行病夺去了数百万人的生命。

Storms are caused by changes in the atmosphere, resulting in high winds and heavy rain. 风暴是由大气变化引起的，导致强风和暴雨。

Thunderstorms are caused by electric charges in the atmosphere that produce lightning, which can cause forest fires. 雷暴是由大气中产生闪电的电荷引起的，闪电可以引起森林火灾。

Some storms cause flooding, and major damage to homes and cities. 一些风暴造成洪水，并对房屋和城市造成重大破坏。

To reduce the danger of an explosion, it’s important to prevent gas leaks inside the home. 为了减少爆炸的危险，防止家里煤气泄漏是很重要的。

Many forest fires are caused by lightning. 许多森林火灾是由闪电引起的。

Epidemics have killed more people than all wars and natural disasters. 流行病造成的死亡人数超过了所有战争和自然灾害。