impregnable

英[im'pregnəbl]美[im'pregnəbl]

adj.
1. 坚不可摧的；牢不可破的
2. 不可战胜的；难以改变的

同：	[a.] conceptive, inexpugnable, inviolable, secure

Immune to attack;impregnable.
固若金汤攻不破的;固若金汤的收藏
impregnable virtue
坚贞不屈的情操收藏
They are virtually impregnable to attack from any other party.
其他党派简直无法攻倒他们。收藏
an impregnable fortress.
固若金汤的堡垒收藏
Business then had entrenched itself into an impregnable position in american life
那时商业已在美国人的生活中占据了坚不可摧的地位。收藏

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