Real friends are hard to find.
真正的朋友是很难找的。
To be free is to accept responsibility for one's own life.
Children’s books should be full of warmth, not just lessons.
量子力学的美在于它能够描述最小尺度下粒子的行为,即使它违背了我们的经典直觉。
I'm just a song and dance man.