出处:1892年纽约芝加哥的电话线路开通。电话发明人贝尔第一个试音时的声音，这一历史性声音被记录下来。

我无话可说，我正在说它。

Rent is that portion of the produce of the earth which is paid to the landlord for the use of the original and indestructible powers of the soil.

"The best way to find yourself is to lose yourself in the service of others."

可持续性不是一种趋势，而是我们对后代的责任。

"To write is to rewrite."

History is not just the story of the past, but a mirror to the present and a window to the future.

The language of mathematics is the language of the universe, and by learning it, we can understand the cosmos.