1. For years Sundback lay awake half the night trying to solve the problem. In 1913 he designed a hookless fastener that worked.
    一连几年，森德贝克夜不能寐，试图解决这一问题。1913年，他设计了一种性能理想的无钩扣件。

2. 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。