No one will protect what they don't care about, and no one will care about what they have never experienced.

"I think that the best work comes out of the necessity to do it, not the desire to do it."

桥梁不仅是一种结构，也是人类进步的象征。

解释：才华有高下之分，没有古今之别；文章有真实、虚伪之差，没有新旧之异。