Two birls Teacher的意思|示意

两只鸟 ...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. 两只鸟 老师： 这儿有两只鸟，一只是麻雀。谁能指出哪只是燕子，哪只是麻雀吗？