Machinery and labor-saving devices are only valuable as they serve to reduce the cost of manufacture.

Education is the art of making man ethical.

"You can't control everything, but you can control how you react to things."

Collaboration is the root system of progress in sustainable forestry.

每个故事都有结局，但在生活中，每个结局都只是新的开始。

词汇不仅仅是声音或符号，而是事实的标志。