1. The instability of atmosphere, coaction of dynamic and thermodynamic power, and water vapor transmit conditions are necessary condition to induce thunderstorm. 大气层结的不稳定、动力热力共同作用以及充足的水汽输送是强雷暴天气形成的必要条件。
2. Introduced the method for analysis and calculation of coaction between raft foundation, piles and ground for an expressway office, it is useful for reference of the same project. 介绍某高速公路管理处考虑筏板-桩-地基共同作用的分析与计算方法，以供类似工程参考。
3. The happening of debris flow is a complicated problem, and it is the outcome of polysynthesism coaction, this brought difficulty to analytical prediction of development trend of debris flow. 泥石流的发生与否是一个极其复杂的问题，而且是由多种因素共同作用的结果，这也给泥石流活动发展趋势的分析预测带来了困难。
