diplanetism

例句：

1. 1. The theory of diplanetism proposes that the Earth is not unique in its formation, but rather, it is part of a larger group of planets.
   双行星说理论提出，地球并非独一无二的星球，而是更大行星群的一部分。
2. 2. In diplanetism, the Earth is considered to be part of a larger solar system, similar to otherterrestrial planets.
   在双行星说中，地球被视为太阳系中的一个更大的系统的一部分，与其他的类地行星相似。
3. 3. Diplanetism challenges the traditional understanding of the universe, suggesting that there might be more than one planetary system in existence.
   双行星说挑战了传统的宇宙理解，暗示可能存在不止一个行星系统。