逻辑是所有数学推理的基础。

Polka dots can't stay alone, like human existence.

煤炭不仅仅是一种商品，更是现代文明赖以建立的基础。

量子计算的挑战不仅在于建造量子计算机，还在于理解它能做什么。

One should not believe or disbelieve， but rather remain in suspense.

I dream that my son will grow up to be a good person, a free person. I dream that someday you will return to revisit the land of our childhood. I dream that flowers will bloom in the streets again...and kites will fly in the skies!