《空中勇士：勇战蓝天》dvvt是什么意思

　　The bomber that ended World War II and ushered in the Atomic Age. The Nazi fighter that, in its day, racked up more aerial victories than any other aircraft. The USAF jet fighter that was called up out of desperation to take on the mighty MiG-15. This season, we showcase the star Air Warriors of World War II and the early days of the Cold War. From America's B-29 Superfortress ... (展开全部)