insoluble riddles.

• 解不开的谜语

insoluble riddles.的用法和样例：

例句

1. Why are riddles unanswered like a party that no one comes to?
   为什么没有被答出来的谜语就像没有人来参加的宴会一样？
2. This learning activity allows users to answer rhyming riddles and then check their answers online.
   这个学习活动允许使用者回答押韵的谜语然后在线核对答案。