Browsing Chinese (Simplified) translation

41.

The first part of an image name is the image tag. If an image is being shown, and another image with the same tag is on the screen, then the image that's on the screen is replaced with the one being shown. This happens on line 19, the second show statement. Before line 19 is run, the image "sylvie smile" is on the screen. When line 19 is run, that image is replaces with "sylvie surprised", since they share the "sylvie" tag.