| 单词 | Archean eon |
| 例句 | Relatively pristine in condition, such outcrops, along with others in South Africa, have long been a popular place to look for traces of life from the Archean eon, which ended 2.5bn years ago. Fossils in Western Australia could hold clues for life on Earth ... and beyond 2013-01-08T14:01:11Z |
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