Johnson & Towers said that such knowledge was necessary, though it could be inferred. 约翰逊和托尔斯主张那样的了解是必须的。
Meanwhile, a port has been added to facilities at Johnson South Reef, another reclaimed island in the Spratlys, with up to six security and surveillance towers under construction. 与此同时,在斯普拉特利群岛另一个填海造出的岛屿约翰逊南礁(JohnsonSouth,中国称赤瓜礁)上,在已有的设施之外又建成了一个港口,还有多达六个安防监控塔在建设当中。