“erathem”的概念、定义、翻译、参考文献-科学参考

单词	erathem
释义	erathem [`er·ǝ´them] ^GEOLOGY A chronostratigraphic unit, below eonothem and above system, composed of rocks formed during an era of geologic time.
随便看	sump sump fuse sump pit sump pump sum rule sun sun-and-planet motion sunburn sun compass sun crack sun cross sun crust sundew sundial sun dog sun drawing water sundtite sunfish sunflower sunflower oil sun follower sun gear sun-grazing comet S-unit meter sunk

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