This process places the U. s. Navy in the role of being the world's only organization to design, build, operate, and recycle nuclearpoweredships.
美国海军在这个过程中地方作用作为世界上唯一的组织设计、建设、经营、再造核动力船舶。
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Nuclear energy has an excellent safety record, but there are now over 430 commercial nuclear-power plants in the world, in some 30 countries, and over 200 nuclear-poweredships and submarines.