parities according to season

例句：

1. 1. The book discusses the historical parities of the region.
   这本书讨论了该地区的历史时期。
2. 2. The scientist made significant contributions to the field during his lifetime.
   这位科学家在他的一生中对这一领域做出了重大贡献。
3. 3. The researcher analyzed the data for several years, recording parities and trends.
   研究员分析了多年的数据，记录了周期和趋势。