"There is no substitute for books in the life of a child."

The good things are not dead.

We are all haunted by the ghosts of our past.

夜晚是一本伟大的书，但星星是它的字母。

Innovation in cement production must balance efficiency with environmental responsibility.

计算机图形学中最重要的就是理解光以及它如何与表面相互作用。