人类社会生活的行为流是由存在的物质条件构成的。
I don't care if you're black, white, straight, bisexual, gay, lesbian, short, tall, fat, skinny, rich or poor. If you're nice to me, I'll be nice to you. Simple as that.
自行车是我改变的工具。它是我产生影响的手段。
To do mathematics is to engage in a dialogue with the universe, seeking answers to questions we may not even know how to ask yet.
Science is the art of asking the right questions.