可持续发展不是一个流行词，而是每天做得更好的承诺。

To talk about painting is not only difficult but perhaps pointless too.

任何农场最好的肥料是农民的足迹。

Quantum mechanics is not just a theory about the world, it is a description of the world at its most fundamental level.

"The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

The ability to associate depends, in turn, on the degree to which communities share norms and values and are able to subordinate individual interests to those of larger groups.

宇宙是一顿免费的午餐。

贫困并非不可避免；它是一个可以解决的问题。