珊珊: Could you tell me something about Mardi Gras?
丹尼尔: Sure, it's a traditional holiday celebrated in many southern states of the USA, especially in New Orleans and Louisiana.
珊珊: How do people there celebrate it?
丹尼尔: They go to parades where they catch beads, doubloons, cups, and trinkets that are thrown from floats. They also have masquerade balls.