gigannum
名词 n.
英文释义
名词 n.
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Rare form of giga-annum (“gigayear, a billion years”).
— Grappling with time – from the nanoseconds of chemical reaction relaxation times to four gigannums of planetary convulsions – is something that actually unites geologists, planetary scientists, and astronomers (including cosmologists).
词形变化
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数据来源: Wiktionary