可想而知

Explanation: Not that you can imagine. 　　Usage: Partial official; as predicate, object, complement, adverbial; for such speculation to imagine 　　Source: Sung-mao, "Han Tang Ye-off series Salary": "and the rural waste service to poetry, Shangguan Chaguan to photo their functions, the semi-sub Paul, acid cold the like, can be imagined." 　　Examples: Do you want to train the Japanese army map of the Northeast as homework, the heart ~. (GAO E "Travels sequel" The first return) 　　Riddle: Lantern riddles