And scientists have discovered the species of song bird performs a tap dance so fast that it can't be seen by the naked eye.

科学家发现了一种能够快速表演“踢踏舞”的歌唱鸟，舞步快到肉眼难以辨识。

Studying song birds and investigating anatomy...Scientists have come to the inescapable conclusion that we're built for speech, and that can only mean one thing.

研究鸣鸟以及发声的生理结构......科学家们得出了必然的结论我们生来就是为了说话的这只意味着一件事。