生物元素含量接近宇宙中的元素比例 Table 5. 1. The percentage abundances of the elements of life, compared with cosmic data Interstellar Volatile fraction Element Bacteria Mammals frost of comets Hydrogen 63.1 61.0 55 56 O xygen 29.0 26.0 30 Carbon 6.4 10.5 Ni Itrogen 1.4 2.4 2.7 Sulfur 0.06 0.13 0.8 0.3 Phosphorus 0.12 0.13 (0.08 Calcium 0.23生物元素含量接近宇宙中的元素比例