如果你借了什么东西，试着在归还的时候把它变得比你借到时的状态更好。清洁它、打磨它、填充它。
If you borrow something， try to return it in better shape than you received it. Clean it， sharpen it， fill it up.
The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.
When technology moves faster than ethics, we're building a future we can't control.
The cosmos is all that is or ever was or ever will be.
未来属于那些相信自己梦想之美的人。