Permanent Fortifications(永备工事), 此释义来源于网络辞典。
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This would turn the maginot line and would not entail the losses likely to be sustained in a frontal attack against permanent fortifications.
这种进攻也会绕过马奇诺防线，并且可以避免对永久性的防御工事正面进攻可能遭受的损失。
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