A model is only as good as the data it is based on.
模型的好坏取决于其所基于的数据。
时间存在的唯一理由是让一切不会同时发生。
The best novels are those that manage to create autonomous worlds, worlds that function according to their own laws and logic.
——2002年6月温铁军在清华大学的一次讲座