今年6月,美国“俄亥俄”号三叉戟核潜艇试航成功,10月底已交付海军并于11月编入现役。这艘潜艇于1976年4月开始动工,历时5年多,耗资12亿美元。在建造过程中,因修改设计、生产效率低、技术劳动力短缺、钢材不合规格、焊接有毛病等一系列问题,使竣工日期推迟了两年多。四代的更新俄亥俄”号是美国最新的第四代核潜艇。第一代是1952年开始建造的,那就是世界上第一艘核潜艇“舡鱼”号(Nautilus又译““鹦鹉螺号)。1955年4月“舡鱼”号核潜艇建成后,又陆续建成了一批同类型的潜艇。这些潜艇的水下排水量都较小,所以都以海洋生物命名,如 In June this year, the “Ohio” Trident nuclear submarine was successfully piloted and was delivered to the Navy by the end of October and entered active service in November. The submarine began construction in April 1976, which lasted more than five years and cost about 1.2 billion U.S. dollars. During the construction period, the completion date was delayed by more than two years due to a series of problems such as modification of design, low production efficiency, shortage of skilled labor force, substandard steel products and defective welding. The fourth generation of the updated Ohio is the fourth-generation nuclear submarine in the United States. The first generation was built in 1952 as the world’s first nuclear submarine, Nautilus, and the Nautilus. After the completion of the “Nautilus” nuclear submarine in April of this year, a number of submarines of the same type have been built one after another, all of which are named after the marine life such as