| 单词 | 难以攻破 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔invulnerable〕The command bunker is virtually invulnerable, even to a nuclear attack.这个指挥部掩体即使是核武器都难以攻破。剑桥高阶〔strength〕The power to resist attack; impregnability.反抗力；难以攻破美国传统The command bunker is virtually invulnerable even to a nuclear attack.这个指挥部掩体实际上甚至核武器攻击也难以攻破。剑桥国际 |
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