Detroit is the poster child for urban decay.

底特律成了都市衰退的典型代表。

The good news is that you can prevent tooth decay!

但我们能够防止龋齿发生，这的确是个好消息！

Because this material doesn't decay very quickly.

因为这种材料不是很快腐烂。

It's providing a means of deciding where the gum has decayed.

它作为一种手段帮助诊断牙龈炎。

Because water fosters bacteria, excess moisture on food can speed up decay.

因为水会滋生细菌，食物上多余的水分会加速腐烂。

They glory in decay and despair.

它们以腐化和使人绝望为乐。

But bones resist such decay due to their structure.

但因为它们的结构，骨骼能抵抗这种腐烂。

In fact, bones do decay, albeit very slowly.

事实上，骨头确实会腐烂，尽管速度很慢。

Decomposition you know of like animals, animals decay.

腐烂，像动物一样腐烂。

Brains may decay first, but decaying guts are much worse.

大脑会最先腐烂，但是内脏腐烂是更棘手的。

This causes them to rot, so that they gradually decay and fall into the lake.

这使它们腐烂，逐渐腐烂，掉进湖里。

It begins to decay and emit positrons, aka, anti electrons.

它开始衰变并释放正电子，也就是反电子。

The newspapers particularly might have deteriorated, decayed or decomposed over time.

尤其是里面的报纸可能已经被腐蚀，或者随着时间自身腐烂降解了。

Tooth decay can eventually destroy your wisdom tooth.

蛀牙最终会毁了你的智齿。

Without this, folly, age, and cold decay.

而不是愚蠢、衰老和朽败的冰凉。

Kara, we calculated the rate of radioactive decay.

卡拉 我们计算过放射衰变率。

After a month, your decaying teeth will form cavities.

一个月后，就会形成蛀牙。

495. The academic topic is why the blade of the spade is still sharp after decades' decay.

这个学术专题（话题）是为什么铁锹的忍在数十年腐蚀之后依然锋利。

Some of this waste takes hundreds of years to decay.

其中一些垃圾可能要几百年才能腐烂。

A hard resin that protected whatever it covered from decay.

一种能保护覆盖物不受风化的牢固树脂。