To escape with a Ph.D., you must meaningfully extend the boundary of human knowledge.

要成功拿到博士学位，你必须真正的扩展人类的知识边界。

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By restricting knowledge of the system to a single layer, a boundary is placed on the overall system complexity, promoting substrate independence.

通过将系统知识限制在单个层，可以限制整个系统的复杂性，促进了底层的独立性。

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Is there anything that is beyond the boundary of human knowledge?

有什么东西是超出人类知识范围的吗？

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But the Tories voted against Lords reform in the full knowledge that it could spell the end for boundary changes and the 20-odd seats it could gift the Tories.

BBC: Boundaries: a running sore?