所有人类行为都有以下七个原因中的一个或多个:机会、自然、强迫、习惯、理性、激情和欲望。
The past is a mirror that reflects the present.
The Black Eyed Peas is a movement, not just a group.
The Lisp language is designed to be extensible, and it is easy to add new features to it.