科学的本质是提出正确的问题。
The paper industry has a unique opportunity to lead the way in environmental stewardship.
Words can be tools, but they can also be weapons.
Every grain we grow carries the legacy of those who cultivated the earth before us.
在现实生活中,善与恶的战争中最困难的一面是决定谁是善谁是恶。
The rule of recognition is the ultimate rule of a legal system.