We have been talking about how sea animals find their way underwater, how they navigate, and this brings up an interesting puzzle, and one I'm sure you'll all enjoy.
我们已经教过海洋动物在水下如何定位，也讲了它们如何辨别方向。这就引出了一个有趣的谜题，我相信大家对此都很感兴趣。
We have been talking about how sea animals find their way underwater, how they navigate, and this brings up an interesting puzzle, and one I'm sure you'll all enjoy.
我们已经教过海洋动物在水下如何定位，也讲了它们如何辨别方向。这就引出了一个有趣的谜题，我相信大家对此都很感兴趣。
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