Freedom is a heavy load, a great and strange burden for the spirit to undertake.

Sustainability is not a cost - it's the biggest innovation opportunity of our lifetime.

The spread of liberal democracy has been accompanied by the spread of a global culture that is increasingly homogeneous.

The needs of farmers are the direction of our scientific research.

解释：对事物最好的证明是有效果，对论点最好的认定是有证据。