閱讀下面漫畫，先對漫畫的內容進行描述，然后對這一現象發表自己的看法。（100詞左右）

　　參考詞匯：

　　西瓜皮：water-melon skin

　　長凳：bench

　　One possible version

　　The boy and the girl in the picture sat on a bench talking merrily while eating a water-melon. When they went away they left the melon’s skin on the bench, making it very dirty. They didn’t want to take any trouble throwing it into the dustbin although it was very near where they were sitting. Instead, they said that there would be someone who should clean the rubbish.

　　However, what they did violate public morality. If everyone behaves in this way, the world will be a big rubbish dump with flies flying round and people will live in a world of diseases. Besides, dustmen will have a very, very hard job to clean the world we live in.