Think of public responses and visible explanations as a last case scenario, and use these tools and tactics to ensure that you're never put in a position where it's a necessity.

把公众反应和可见的解释看做最后的局面，并使用这些工具和策略来确保你永远不会处于一个必要的境地。

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In case of dire necessity, however, these restrictions may be dispensed with.

在案件可怕的必要性，但是，这些限制可以取消。

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The doctor question us to call him within the night except in case of necessity.

医生吩咐咱们，除非必需，否则无所不能在夜里叫他。

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The automobile is an onerous, expensive obligation and necessity, and in the case of the working poor a brutal tax.

WSJ: Why Driverless Cars Are Inevitable��and a Good Thing

But his examples do not make as powerful a case for the necessity of corporate social responsibility as he would like.

ECONOMIST: The burdens of responsibility

In this case, some form of reconciliation is a social necessity.

CNN: A Debt-Threatened Dream