一个观念的效用决定了它在精神生活中的地位。
Music is the universal language. It's the one thing that can bring people together no matter where they're from.
你的树无法摇摆是因为我。
The challenge with hepatitis C was not just to find the virus, but to understand how it evades the immune system.
我们越是靠理智生活，就越不理解生命的意义。