(3)Central science in 21st century among natural sciences Paleontology (古生物学) Biology(生物学) Biophysics (生物物理学 Biochemistry Medicine Geochemistry ↑ Physics Geology (物理学) Chemistry (地质学) (化学) Chemical physics Chemical engineering Nuclear chemistry Cosmochemistry Astronomy 天体化学) (天文学) Astrophysics (天体物理学) Interrelations among the natural sciences Chemistry (化学) Biochemistry Medicine Nuclear chemistry Biophysics (生物物理学) Paleontology (古生物学） Biology(生物学) Chemical physics Chemical engineering Geology (地质学) Geochemistry Cosmochemistry (天体化学) Astronomy （天文学） Physics (物理学) Astrophysics (天体物理学） (3) Central science in 21st century among natural sciences Interrelations among the natural sciences