Impregnability
n. 攻不破, 不受影响
✅ 同义词
📖 牛津释义
impregnability
n[U].
🗣️ 情景例句
I understand. I really do.
我能理解， 真的。
The best (greatest) fish keep (swim near) the bottom.
好鱼游水底（指：有价值之物不能轻易得到）。
The first sign of disaster was a dead sheep floating down.Next came a horse, swimming bravely,
灾难的第一迹象是一只死羊顺流而下，接着一匹活马勇敢地与水搏击。