To exist is to have a subjective existence.

愚蠢的男人怕老婆，贤良的妇女敬重丈夫。

Topological insulators are a prime example of how theoretical predictions can lead to experimental discoveries that reshape our understanding of the physical world.

The strength of a company lies in its people, not just its products.

个愚蠢的人知道自己的愚蠢，这使他至少是聪明的。一位愚蠢的人以为自己聪明，这才是真正的愚蠢。