常见例句雙語例句The isotopic fractionation under microbial actions belongs to the kinetic isotopic fractionation, which results in the enrichment of heavier isotopes in .通過熱模擬實騐，系統研究了單質硫在有機質生成甲烷過程中對其碳同位素分餾的影響。 返回 isotopic enrichment