You know, in the Middle Ages, in England, when you met a very poor person, that person would be described as an "unfortunate" -- literally, somebody who had not been blessed by fortune, an unfortunate.

习惯的强度是其被强化次数的函数。

If memories had a smell, it would be the fragrance of camphor, sweet and secure, like clearly remembered happiness, sweet and melancholy, like forgotten sorrow.

我们生产的每一块塑料都应该有完整的生命周期规划。

The laws of physics are the language in which the universe writes its story.