英语词汇“impregnable”的读音、翻译、释义、用法及例句-集火网

词汇	impregnable
释义	impregnable [im'pregnəbl] a. 无法攻取的, 坚强不屈的, 驳不倒的
随便看	frontal notch frontal plane frontal plate frontal pole frontal protuberance frontal section frontal segment frontal sinuitis frontal sinuses frontal sinusitis frontal spine frontal triangle front and rear front-back connection front-back interference front barrel front bencher front boundary cell front bumper arm front clearance angle front clipping plane front compression front connection front contact front contact spring

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