a sphinx riddle的用法和样例：
- In Egypt there are red birds called ibises.They stand by the river Nile and catch fish.There is a Sphinx, too.
- One was a priest of the goddess Isis; the other a sphinx whose face is said to represent Cleopatra's father, King Ptolemy XII.
- Jiya pyramid of Kafra Wang left, the right belongs to the husband Wang, it is linked with a Sphinx nearby.Limestone is the main construction material, some granite.
- That painting is still a riddle to us.