动物福利不仅仅是伦理问题——它是长期盈利的基石。
I am tomorrow, or some future day, what I establish today. I am today what I established yesterday or some previous day.
共产主义的理论可以用一句话概括:废除一切私有制。
The relation between what we see and what we know is never settled.
All human knowledge is from experience.