What is the difference between a temporary restraining order and a preliminary injunction?

1 Although petitioner seeks to prevent enforcement of both the temporary restraining order and the preliminary injunction, the order is merged in the injunction (City of Los Angeles v. Superior Court (1925) 196 Cal. 445, 449, 238 P. 670), and our determination will thus be confined to the validity of the injunction.

2 Watson attempts to distinguish New York Times v. United States on the ground that it involved the publication of 'current news' whereas petitioner published seven-year-old excerpts from newspaper articles misrepresented as current news. Obviously, the question whether the published material relates to contemporary or historical events cannot be decisive.