As each new defensive security measure is implemented, it will change the current security posture and subsequently the potential opportunity costs.

每当实施一种新的防御安全措施时，它将会改变当前的安全状况以及紧随其后的潜在的机会成本。

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Now, Republicans are on the defensive about Social Security and unwilling to attack it.

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The charter prohibits any non-defensive use of force not authorized by the Security Council.

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With outdated defensive strategies, it is virtually impossible for security teams to achieve anything close to information superiority.

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