impregnable fortress

基本解释

Impossible odds. An impregnable fortress. A battle like nothing you've ever seen.
困难重重。一座坚不可摧的堡垒。一场前所未见的战斗。
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Within the realm of South American football, the Maracana has taken on mythical proportions and represents an almost impregnable fortress.
在南美洲的足球版图里面，马拉卡纳球场颇具神奇色彩。
In addition to being an impregnable fortress for the Mexican national team, the Azteca has witnessed some of the most electrifying and immortal FIFA World Cup moments of the last 40 years.
在这座球场墨西哥队几乎不可战胜，除此之外，它也见证了在过去40年世界杯历史中的许多激动人心的永恒画面。贝利在这块球场进行的1970年世界杯的决赛中，用一个完美的演出告别了他的国家队生涯。

The shells for the massive guns of this supposedly impregnable fortress were designed to destroy attacking ships, not massed infantry.
FORBES: The Fed Fiddles...
The shells for the guns of this supposedly impregnable fortress were designed to destroy attacking ships, not massed infantry.
FORBES: The Fed Fiddles...
He could be ruthless: his troops massacred 20, 000-25, 000 non-combatants after a four-month siege of Chitor, a nearly impregnable Hindu fortress in Rajasthan.
ECONOMIST: Millennium issue: Muslims and Hindus