supported by National Grand Fundamental Research 973 Program of China(No.2009CB320706,No.2010CB32813);National Core-Hightech-Basic Project(No.2010ZX01045-001-008);the National Nature Science Foundation of China(No.61170001)
A program,when being executed,acts like a mirror that produces mirror images for objects in front of it.A mirror distinguishes itself from others by the way how it changes the shape of an object.A program can be chara...