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

较小的跳蚤还有更小的跳蚤可以咬。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，那么它的价值如何？

Then the exercise would go on again ad infinitum.

然后会无限地继续下去。

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

我我一种精致的谵妄中狂欢。我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 永恒的复发，或永恒的回归，意味着宇宙中的所有存或能量 永远，永远不断重复本身是无限的。

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，首先要避免的是进一步的实验——价值流动的状态的延续，并被无限地测试、选择和批评。