VOA慢速英语:巴格达隧道成为伊拉克抗议者的艺术空间

mural - n. a usually large painting that is done directly on the surface of a wall

portrait - n. a painting, drawing, or photograph of a person that usually only includes the person's head and shoulders

motorized - adj. having an engine

symbol - n. an action, object, event, etc., that expresses or represents a particular idea or quality

mock - v. to criticize and laugh at (someone or something) for being bad, worthless, or unimportant

helmet - n. a hard hat that is worn to protect your head