Generally, past expenditures represent sunk costs that cannot be altered in the future and may or may not be relevant in the future.

通常把从前已经产生且在未来无法再转变的支出称为“淹没成本”。

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Therefore, we cannot guarantee that information may not be accessed, disclosed, altered, or destroyed by breach of any of our physical, technical, or managerial safeguards.

因此，我们不能保证这些信息不可能被以违反我们的物理、技术或管理类安全措施的方式访问、披露、更改或破坏。

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The group dismisses concerns that this could be dangerous, pointing out that despite E. coli's poor reputation, they use an altered form that cannot exist outside a rich synthetic medium.

研究团队反驳了对此可能产生危险的担忧。他们指出尽管大肠杆菌的声誉不好，但他们所使用的是离开了丰富的培养基即无法生存的变种大肠杆菌。

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But the worst drawback for South African business is its scarcity of skills, something that cannot be altered fast.

ECONOMIST: South Africa

If we assume other people hold rigid beliefs that cannot be altered, we give up on their ever being part of our family or community.

FORBES: Win By Letting Your Enemy Win