1"backward" 2 "make detours" 3 "the law of gravity" 4 "Newton's mechanics's Law"
5 "Euclid theorem" 6 "non-Euclid theorem" 7 "crystallization of the wisdom"
8 "ultimate challenge" 9 "Mercedes (license plate)" 10 "BMW (plates)"
11 "Xiali (plates)" 12 "Chanel" 13 "Holmes detective novels"
14 "science fiction" 15 "fable" 16 "detective novels" 17 "developing expertise"
18 "breeding" 19 "hybrid rice" 20 "transgenic soybeans" 21 "genetically modified"
22 "comic book"