The flying saucer is yet an unsolved mystery.
飞碟仍然是未解之谜。
思议的东西;The flying saucer is yet an unsolved mystery.
飞碟仍然是未解之谜。
Another problem of minimality also remains unsolved—to wit, what is the smallest number of digits a puzzle maker can place in a starting grid and still guarantee a unique solution?
另外还有一类「极小」的问题也还没有解决：在保证有唯一解的条件下，一个初盘至少需要几个
？
明：以上例句、词性分类均由互联网资源自动生成，部分未经过人工审核，其表达内容亦不代表本软件的观点；若发现问题，欢迎向我们指正。
