http://www.pons.de/produkte/3-12-517841-X/（牛津大学出版社授权产品）
英语
西班牙语
fortress [美 ˈfɔrtrəs, 英 ˈfɔːtrɪs] 名词
- fortress
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- impregnable rampart/fortress
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- impregnable rampart/fortress
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- unassailable fortress
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- seize town/fortress
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西班牙语
英语
在《PONS词典》中的词汇
在《PONS词典》中的词汇
无例句可用
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单语范例（未经PONS编辑处理）
At the time the shoreline below was considered to be unassailable, as it was swept by strong currents.
en.wikipedia.org Furthermore, the steep and rugged terrain to the north of the site made the citadel established there almost unassailable.
en.wikipedia.org This unassailable structure withstood a number of sieges.
en.wikipedia.org This does not mean that an exercise of such a contractual discretion is necessarily unassailable; it may be voidable at the instance of the other party.
en.wikipedia.org Legally, a governor's authority was unassailable.
en.wikipedia.org