It's impossible to translate this exactly, you'll never fully appreciate the piece.
这篇文章不可能准确翻译,所以你也许永远不可能好地阅读它。
later, we shall undergo a progressive loss of our vigour and resistance which, though imperceptible at first,
再迟一些,我们就要经历生命力和抵抗力逐步衰退的过程。虽然这个过程起初难以觉察,