Time travel is the most frustrating thing in the world. You can't change anything, and you can't stop anything from happening.
最大的性能改进是当系统从不能工作到能工作的时候。
The strength of a building is not just in its materials, but in the spirit of the people who use it.
建筑的强度不仅在于其材料，还在于使用它的人的精神。