“Boltwood, Bertram Borden (1870–1927)”的概念、定义、翻译、参考文献-科学参考

单词	Boltwood, Bertram Borden (1870–1927)
释义	Boltwood, Bertram Borden (1870–1927) Geology and Earth Sciences Professor of radiochemistry at Yale University, in 1907 Boltwood made early determinations of the age of the Earth using uranium:lead ratios. He was able to show a long geologic timescale of up to 2000 Ma. See radiometric dating.
随便看	COMMON area common-base connection common-base current gain common-base forward-current transfer ratio(symbol: α) common branch Common Business Oriented Language common canal common carrier common-cathode connection common-collector connection common consent arguments Common Criteria Common Data Security Architecture common denominator common depth point common-depth-point stack common difference common-drain connection common-emitter connection common-emitter forward-current transfer ratio common envelope binary common external tariff common factor common fraction common-gate connection

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