1·Without any external assistance, the nuclear submarine programme encountered enormous technical and financial difficulties and was temporarily suspended in 1963.
没有任何的外部协助,核潜艇计划遇到了巨大的技术上和财政困难并且暂时在1963年中止。
2·The incident took place around 75 miles off Hainan Island, where China - which claims a 125-mile EEZ - has built an underground nuclear submarine base.
事件发生在海南岛外大约75海里处,在那里中国-主张125海里专属经济水域(EEZ)-已经建造一座地下核潜艇基地。