介绍:
Ten in the bed There were ten in the bed and the little one said: Roll over, roll over! So they all rolled over and one fell out, There were nine in the bed and the little one said: Roll over, roll over! So they all rolled over and one fell out, There were eight in the bed and the little one said: Roll over, roll over! So they all rolled over and one fell out, 数量每次递减一个!