And they appear to have evolved between 95 million and 1.9 million years ago, based on molecular clock methods.
根据分子钟方法，它们似乎是在 9500 万到 190 万年前进化而来的。
| 单词 | clock method |
| 例句 |
原声例句
PBS地球-动物趣闻 And they appear to have evolved between 95 million and 1.9 million years ago, based on molecular clock methods. 根据分子钟方法，它们似乎是在 9500 万到 190 万年前进化而来的。 |
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