英语听力精选进阶版 13289（在线收听） |
Earth may house 8.7 million species Vocabulary devised came up with a plan reliable accurate intelligent guesses estimates based on a rational process of thought reckon calculate classification system grouping of organisms following pre-established patterns catalogued identified and recorded hastening extinctions speeding up the disappearance of some species wistfully sadly hitherto up to now vanish disappear |
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