Kondratieff cycle

例句：

1. 1. The Kondratieff cycle is a model that explains the relationship between economic growth and technological innovation.
   康拉德尼夫循环是一个模型，解释了经济增长与技术创新之间的关系。
2. 2. The discovery of this cycle has led to significant advancements in renewable energy technology.
   这一周期的发现导致了可再生能源技术的重大进步。
3. 3. The Kondratieff cycle has been proposed as a potential explanation for the long-term stability of global economies.
   康拉德尼夫循环被提出作为全球经济长期稳定的潜在解释。