contingency theorem

例句：

1. 1. This contingency theorem states that if the temperature is below zero degrees Celsius, then there will be a decrease in visibility.
   这个应急定理表明，如果温度低于摄氏零度，那么能见度将会降低。
2. 2. The company's contingency plan for this emergency situation was to have backup generators ready at alltimes.
   该公司对这个紧急情况的应急计划是随时准备备用发电机。
3. 3. Due to the sudden change in weather conditions, we need to follow the contingency theoremand take appropriate measures.
   由于天气条件突然变化，我们需要遵循应急定理并采取适当措施。