学进去

There were many beautiful flowers in the green grass near the river. Then someone threw an empty（空的）bottle in the grass. A little monkey walked by, and he saw something in the grass.“Oh, it's an empty bottle. It is of no use, ”he said. And then he left（离开）. There were two tortoises（龟）near the river. They saw the bottle, too. The younger tortoise had hurt his leg two days before. So the older tortoise took the empty bottle out of the grass and put his brother on it. Now the two tortoises could go swimming together in the river. The older tortoise said, “Look! It is a useful bottle.”The younger tortoise was very happy. What is useless（无用的）to someone may be useful（有用的）to someone else.