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   English ⇄
Google | Forvo | +
impregnable [ɪm'pregnəb(ə)l] adj.
gen. 攻不破的; 不动摇的; 坚不可摧的; 坚定不移的
archit. 填塞坚实的; 充满的
eng.geol. 可浸透的; 可渗透的; 坚固的
plast. 可渗浸的

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