Even with the greatest effort, our span of attention fluctuates.

即使付出最大的努力，我们的注意力也会波动。

But the other thing about Aadar is that he has a very short span, of attention span.

但关于 Aadar 的另一件事是他的注意力跨度非常短。

This phenomenon reveals how our span of attention fluctuates, for the intensity of the ticking is actually constant.

这个现象揭示了我们的注意力广度是如何波动的，因为滴答声的强度实际上是恒定的。