释义：只有经过艰苦的努力和考验，才能发现或创造出价值重大的事物。
Innovation in forestry practices is the key to balancing economic growth and environmental preservation.
身体劳累而不休息，就会疲困；精力使用过度而不止歇，就会衰竭。
The challenge of computer science is not just to build faster machines, but to understand the very fabric of computational possibility.
To write is to give shape to the formless.