英文: All is riddle, and the key to a riddle is another riddle.
中文: 爱默生:所有的事物都是谜团,而解开一个谜的钥匙是另一个谜。英文: He could not solve the riddle .
中文: 他猜不出这个谜。英文: Robert's disappearance is a complete riddle.
中文: 罗伯特的失踪完全是一个谜。英文: But behold a marvel and a riddle!
中文: 但,请看吧,一个奇迹,一个谜。英文: That painting is still a riddle to us.
中文: 那幅画对我们来说仍然是个谜。