fortifications that made the frontier inviolable.
边疆上牢
防御工事
fortifications that made the frontier inviolable.
边疆上牢防御工事
The fortifications were out of repair.
防御工事年久失修。
the most enormous complex of fortifications in all Islam.
整个穆斯林世界中最庞大联合防御体系。
声明：以上例句、词性分类均由互联网资源自
，部分未经过人工审核，其表达内容亦
代表本软件
观点；若发现问题，欢迎向我们指正。
