theories of schools of traditional Chinese medicine

例句：

1. 1.Theories about the origin of life have been proposed for centuries.
   关于生命起源的理论已经提出几个世纪了。
2. 2.The scientist has made several theories about the phenomenon.
   这位科学家提出了几个关于这一现象的理论。
3. 3.Theories about the cause of global warming are still being debated.
   关于全球变暖原因的学说仍在辩论中。