过去总是存在，只是有时比其他时候更明显。

"The future of AI lies in making machines that can understand and reason about the world."

Collaboration is the root of progress in forestry—no single entity can solve the challenges alone.

The existence of a legal system depends on the general acceptance of its rules by the society.

计算机是一种表达媒介，就像钢琴是一种表达媒介一样。