| 释义 |
The barbed wire fences and security shields made the air base very difficult to penetrate.带刺的铁丝网和安全防御设施使空军基地难以突破。The Commander in Chief visited the island personally, and took steps toward strengthening the defense facilities and fortification.司令亲自登上该岛，采取措施加强防御设施和工事。 |