Proceeded from the relationship between geochemical environment and mankind existence, and based on the data of regional stream sediment survey, the geochemical environment map is drown up.
本文从地球化学环境与人类生存关系出发,依据区域化探水系沉积物资料编制环境地球化学图。
But only 40 years ago it seemed impossible that mankind would ever map the billions of letters in its own DNA.
但就在40年前,人类描绘自身dna的亿万个字母这样的事看上去还不可能。
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