There is a slogan at a tourist attraction. Please write down your understanding. The slogan is: Leave nothing but your footprints: Leave nothing but your memory.

1. Tell tourists to care for the environment and not to throw away melon peels and fruit scraps, damaging the environment; in addition, they should not pick flowers, plants and trees indiscriminately, including some public items.

2. This notice is well written. First, its language is subtle, not blunt, and very tactful, making it acceptable. Second, it can better remind tourists to pay attention to environmental protection and personal cultivation, and to travel in a civilized manner. .The best of both worlds.