我们能在很多地方，比如医院、博物馆、街道、公园见到各类公共标志。它们通

We can see various public signs in many places, such as hospitals, museums, streets, and parks. They are usually brightly colored and expressed graphically. <br><br>2. Most public signs can provide us with useful information. They can help us find our way and tell us the places around us; they remind us to stay away from danger and warn us not to do something. For example, in art museums, we can always see the "no photos" sign

We can see all kinds of public signs in many places, such as hospitals, museums, streets and parks. They are usually brightly colored and expressed graphically.<br><br>2. Most public signs can provide us with useful information. They can help us find a way and tell us where we are; they remind us to stay out of danger and warn us not to do something, for example, in art museums where we can always see the "no photography" sign

We can see all kinds of public signs in many places, such as hospitals, museums, streets and parks. They are usually brightly colored and graphically expressed.<br>2. Most public signs can provide us with useful information. They can help us find our way, tell us the place around us; they remind us to stay away from danger, warn us not to do something, for example, in the art museum, we can always see the "no taking pictures" sign<br>