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.
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
数学不是关于数字、方程、计算或算法：它是关于理解的。
In darkness, we learn to cherish the light.
我为我的声音而战，我赢了。
A good book is a book that changes you.
经济增长的关键在于发现新的配方，并将想法转化为有价值的商品和服务。