cosmic abundance of elements

例句：

1. 1.The study of cosmic abundance is crucial for understanding the origin of life on Earth.
   研究宇宙中的元素丰度对于理解地球上生命的起源至关重要。
2. 2. The abundance of elements in the universe has led to the formation of planets and stars.
   宇宙中元素的丰富性导致了行星和恒星的形成。
3. 3.The cosmic abundance of hydrogen and helium is thought to be a key factor in the evolution of the universe.
   宇宙中氢和氦的丰度被认为是宇宙演化的关键因素。