1. The dentist could detect no decay in her teeth.
    牙医检查了她的牙, 未见有龋齿.

2. Only a small fraction of the creatures that die are preserved in this way before decay sets in or, even more likely, before scavengers eat them.
    死去的生物中也只有一小部分能在开始腐烂前，或更可能在被食腐动物吃掉之前，被这样保存下来。

3. And if, with the decay of vitality, weariness increases, the thought of rest will be not unwelcome.
    再者，随着精力的衰退，老年人的疲惫会增长，有长眠的愿望未尝不是一件好事情，

4. As I stand there, the smell hits my nose, and I close my eyes as I remember the smell of decay from past experience.
    我站在那里，一股怪味刺激着我的鼻子，我想起了过去闻到过的腐烂的气味，我闭上了眼睛。

5. Stone does not decay, and so the tools of long ago have remained when even the bones of the men who made them have disappeared without trace.
    石头是不会腐烂的。因此，尽管制造这些工具的人的骨头早已荡然无存，但远古时代的石头工具却保存了下来。