Maybe he's worried that he's going bald.  This ability to focus our attention on something other than the present is really amazing. It allows us to learn and plan and reason in ways that no other species of animal can.
可能他正在担心自己快要秃了。 这个能力使我们能让我们把更多注意力转移到其它地方 而不是当下正在做的事 这实在是太惊人了。这个能力让人类 以自己独有的方式学习，设计和理解。