| 释义 |
DEFINITIVE EXAMPLES 权威例句〔Gibraltar〕An invincible fortress or stronghold.难攻打的城堡或要塞美国传统〔impregnable〕In those impregnable mountains, the guerrillas could hold out for years.在那些易守难攻的大山里, 游击队员们可以坚持数年。外研社新世纪〔impregnable〕In those impregnable mountains, the guerrillas could hold out for years.在那些易守难攻的大山里，游击队可以坚持很多年。柯林斯高阶〔learning〕The whole team has been on a steep learning curve since the project began.在这个项目开始后整个组都在克难攻坚。牛津搭配 |