And these have smaller still to bite 'em And so proceed ad infinitum.

较跳蚤还有跳蚤可以咬。哪是尽头谁知晓。

If a piece can be replicated ad infinitum, how does one ascribe worth?

如果一件作品可以无限复制，那么它价值如何？

Then the exercise would go on again ad infinitum.

然后练习就会无限地继续下去。

I think I rave in a kind of exquisite delirium.  I should wish now to protract this moment ad infinitum; but I dare not.

我我在一种精致谵妄中狂欢。我现在希望无限地拖延这一刻；但我不敢。

Friedrich Nietzsche talked about the concept of eternal recurrence, or eternal return, meaning all existence or energy in the universe has forever and will forever keep repeating itself ad infinitum.

Friedrich Nietzsche谈到了这个概念 永恒复发，或永恒回归，意宙中所有存在或能量 永远，永远不断重复本身就是无限。

In consequence, the thing that is to be avoided above everything is further experimentation—the continuation of the state in which values are fluent, and are tested, chosen and criticized ad infinitum.

因此，首先要避免是进一步实验——价值流动状态延续，并被无限地测试、选择和批评。