There is a snail who is always prejudiced against a frog. One day, the patient frog asked the snail, "Mr. Snail, did I offend you? That's why you hate me so much." The snail said, "You have four legs to jump around, but I have to climb on the ground with a heavy shell on my back. I feel very unhappy." The frog said, "Every family has its own problems. You just saw our happiness and didn't see our pain. " At this time, a huge eagle suddenly attacked, the snail quickly hid in the shell, but the frog was eaten by one bite.