在黑暗中，我们才能真正看清自己。
In darkness, we can truly see ourselves.
Psychology is the science of mental processes.
数学是一种创造性的努力，就像艺术或音乐一样。
Happiness is not a destination, it's a way of life.
真正的进步不仅仅以利润来衡量，还以我们对社会的积极影响来衡量。
If you lose or forget to bring a cable，adapter or charger，check with your hotel. Most hotels now have a drawer full of cables，adapters and chargers others have left behind，and probably have the one you are missing. You can often claim it after borrowing it.