法律效力的概念对于理解法律的本质至关重要。
The concept of legal validity is crucial for understanding the nature of law.
I've learned that growth comes from pain and struggle.
闭上眼睛去看。
The most powerful tool in science is not technology, but imagination.
Painting is a way of life, a way of understanding the world.
In refining, efficiency isn't an option—it's the oxygen that keeps this industry alive.