有时候他们会保存一篇长文章，却没有任何证据表明他们曾经返回去认真读了它。
Sometimes they'd save a long article, but there's no evidence that they ever went back and actually read it.
有时候他们会保存一篇长文章，却没有任何证据表明他们曾经返回去认真读了它。
Sometimes they'd save a long article, but there's no evidence that they ever went back and actually read it. The authors of the study report.
关于这些蝴蝶最令人惊奇的事情是，它们返回墨西哥的同一棵树，那是它们的高祖父母曾经在冬天栖居过的树。
The most amazing thing about these butterflies is that they return to the very same trees in Mexico that their great-great-grandparents used the winter before.
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