1.The lofty walls of the castle seemed impregnable.
这座城高墙似乎坚不可摧。
2.Liverpool should have used their good fortune to forge an impregnable half-time lead.
利物浦队本应用他们好运取得摧枯拉朽般半场领先。
3.They will establish impregnable fortresses.
他们将建造坚不可摧城。
4.O, how shall summers honey breath hold outAgainst the wreckful siege of battering days,When rocks impregnable are not so stout,Nor gates of steel so strong, but Time decays?