Unfortunately, it is in the nature of the archaeological evidence, which is almost invariable only a sample of what once existed, that such figures will always be elusive.

不幸的是，从考古学证据的性质来看，这类人物总是难以捉摸的，因为考古学证据几乎是一成不变的，只是曾经存在过的东西的一种样品。

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Professionals, once they've determined how to make a shot, follow an invariable routine that renders conscious thought unnecessary.

职业球手一旦决定怎么击球，他们会按照一种视有意识的思想为多余的固定不变的常规行事。

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Theserules are a fixed and invariable relation.

这些法则是一种固定不变的关系。

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And it's important to remember that Milton will - this is probably an invariable truth, but I'll qualify it nonetheless - that Milton will typically imitate his predecessors only with a difference.

重要的是我们要记住弥尔顿将,这应是无可否认的事实，但我还是要验证一下,弥尔顿通常将,模仿他的文学前辈而仅留一个不同之处。

耶鲁公开课 - 弥尔顿课程节选