After the Second World War, the Navy scrapped many of its ships and sent many more into a ready-reserve " mothball" fleet.
第二次世界大战后,美国海军报废了许多舰船,并将更多的舰船送入预备役“后备”舰队。
英语百科
Reserve fleet
A reserve fleet is a collection of naval vessels of all types that are fully equipped for service but are not currently needed, and thus partially or fully decommissioned. A reserve fleet is informally said to be "in mothballs" or "mothballed"; an equivalent expression in unofficial modern U.S. naval usage is "ghost fleet". In earlier times, and especially in British usage, these ships were said to be laid up in ordinary.