Teacher: Here are two birds, one is a swallow, and the other is a sparrow. Now who can tell us which is which?

Student: I cannot point out, but I know the answer.

Teacher: Please tell us.

Student: The swallow is beside the sparrow and the sparrow is beside the swallow.

老师：这儿有两只鸟，一只是燕子，另一只是麻雀。谁能指出哪只是燕子，哪只是麻雀呢？学生：我指不出来，但我知道答案。

老师：请说说看。

学生：燕子旁边的是麻雀，麻雀旁边的是燕子。