Two birls

　　Teacher: Here are two birds, one is a swallow, the other is 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.

　　兩只鳥

　　老師：這兒有兩只鳥，一只是麻雀。誰能指出哪只是燕子，哪只是麻雀嗎? 學生：我指不出，但我知道答案。老師：請說說看。學生：燕子旁邊的就是麻雀，麻雀旁邊的就是燕子。