The only service a friend can really render is to keep up your courage by holding up to you a mirror in which you can see a noble image of yourself.
朋友能提供的唯一幫助，就是通過(guò)舉一面鏡子讓你看到自己高尚的形象，從而保持勇氣。
The study of topological phases of matter is a testament to the power of theoretical physics to predict and explain new states of matter.
Silence is a virtue, but silence in front of someone you like is cowardice.