dual phenomenon

例句：

1. 1.The emergence of dual phenomena in the market economy has brought about significant changes.
   市场经济中的双重现象的出现带来了重大变化。
2. 2.The study of dual phenomena is crucial for understanding the dynamics of complex systems.
   研究双重现象对于理解复杂系统的动力至关重要。
3. 3.The dual phenomenon of economic growth and environmental degradation is a pressing issue that needs to be addressed urgently.
   经济增长与环境退化的双重现象是一个迫切需要解决的紧迫问题。