1. Imagine a pen attached to the weight in such a way that its point rests upon a piece of paper on the floor. Imagine an earthquake shock shaking the floor, the paper, you and your hand.
    假定把一支笔拴在重物上，笔尖落在地板上的一张纸上，假定地震发生了，地板、纸、你和你的手都会动，重物和笔都却不运动。

2. Ideally, people would like to know when an earthquake is going to happen and how bad it will be.
    从理想上说，人们希望知道地震什么时候发生，破坏程度如何。

3. If there is an earthquake, there will be lots of fragments of broken glass.
    发生地震时会有大量的玻璃碎片。

4. If an earthquake happens in a large city, many of the telephone lines within the city are likely to be down.
    地震若发生在大城市，市里的许多电话线路很可能中断，

5. For example, the Chinese have noted that before an earthquake, hens' behavior changes — they refuse to enter their cages at night.
    例如，中国人已经注意到，地震之前鸡的行为有异常：它们夜晚不肯进笼。