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防御工事的出击口(通常为拱形)；后门。
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防御工事的出击口(通常为拱形)；后门。；由两道门控制的入口,一道关好后另一道才能开启。；突破口; 暗门
An opening into or entry to a fortification, usually arched, to enable a sally; a postern.
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防御工事的出击口(通常为拱形)；后门。
An opening into or entry to a fortification, usually arched, to enable a sally; a postern.
由两道门控制的入口,一道关好后另一道才能开启。
An entryway controlled by two doors or gates, each of which must be closed before the other can open.
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页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.