| 单词 | 防御设施 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔ENTER〕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。朗文写作活用〔PERSONALLY/YOURSELF〕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。朗文写作活用 |
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