The beauty of a mathematical proof is in its elegance and the way it reveals the underlying truth in a clear and concise manner.
Coal is not just a commodity, it's a commitment to America's future.
不沉溺于过去，全力以赴面向未来。
Don't interfere with anything in the Constitution. That must be maintained, for it is the only safeguard of our liberties. And not to Democrats alone do I make this appeal, but to all who love these great and true principles.
