The only limit is the one you set for yourself.
促进民主的最有效方式不是通过军事干预,而是通过建立制度和促进经济发展的缓慢而稳定的过程。
The boundary between physics and mathematics is not as clear-cut as one might think.
The study of heuristics reveals how we make quick, efficient decisions, but also how these shortcuts can lead to systematic errors.
如果你没有失败,说明你不够努力。