What makes us human, I think, is an ability to ask questions, a consequence of our sophisticated spoken language.

What makes us human, I think, is an ability to ask questions, a consequence of our sophisticated spoken language.

我认为，我们之所以为人，是因为我们有问问题的能力，这是我们复杂的口语的结果。

-- Jane Goodall 简·古道尔