考得
发表于 2025-3-28 15:42:18
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BALK
发表于 2025-3-28 20:36:46
,Cosmic Ray Produced Neutrons and Nuclides in the Earth’s Atmosphere,otons, antinucleons, electrons, positrons, neutrinos, mesons, hyperons, stable nuclides, radionuclides, X-rays and gamma rays. Although the production of these various secondaries are thus intimately related, the general problem has never been attacked as a whole, nor do I find that it has ever been
organism
发表于 2025-3-29 02:59:20
Radioactive Isotopes on the Moon,n by Bauer (1947) that the helium observed in meteorites was mostly produced by cosmic rays. The first searches for tritium in iron meteorites by Fireman (1958) led to the possibility of measuring the cosmic ray exposure ages of meteorites. By the time of the first lunar landing there were a number
植物群
发表于 2025-3-29 05:35:25
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使熄灭
发表于 2025-3-29 10:28:04
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影响深远
发表于 2025-3-29 14:05:14
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