杜库 is the standard mainland transliteration of Count Dooku (
杜库伯爵), the fallen Jedi played by Christopher Lee in Star Wars Episodes II and III. His Sith name is Darth Tyranus (
达斯·
泰勒纳斯). The name has stayed transliterated rather than translated — Chinese fans use
杜库 in the same casual way English fans say 'Dooku'.
