他们的疼痛可能会持续数天或数周时间，然后消失，这只是短暂的停止。

Their pain can last for days or even weeks at a time, then dissipate, only to return.

youdao

因此我不得不采取了一种自认为最没有疼痛感的方式，结束了这只已经处于巨大痛苦之中的花栗鼠的生命（我不想介绍细节）。

So I did, in the way that I thought would be the least painful to the animal that already was in a lot of pain (I won't go into the details).

youdao

这只是阑尾炎造成的疼痛。

It's just a twinge of appendicitis.

youdao