用汉语写出这则语言故事的寓意
An ant was drinking at a river.Suddenly he slipped,and fell into the water.
A dove took pity on him.She threw a small branch into the river.The ant seized the bough,and swam back to the shore.
A few days later,the ant saw a hunter aiming a gun at the dove.He bit the man in the foot sharply.
The man missed the shot,and the dove's life was saved.
The dove felt very grateful.She made good friends with the ant.