It's just that once was generated from split Uranium, it decayed very quickly.
它一旦从分裂的铀中产生，就会很快衰变。
Therefore, if that ever had been present on Earth, it would have decayed ages ago.
因此，如果它曾经在地球上存在过，那么它在很久以前就应该衰变了。
A dentist fills decayed teeth.
牙医填补龋齿。
我的房子是一幢倾圮的房屋。
小，弱或蛀牙。
This big one is badly decayed.
这颗大牙被严重地腐蚀了。
这颗牙蛀得厉害。
The place stank of decayed fish.
那地方有烂鱼的臭味。
我拔掉了一颗蛀牙。
That place stank of decayed fish.
那地方有烂鱼的臭味。
我有两颗龋齿。
The orbit of a space satellite decayed.
人造卫星轨道的能量消减了。
我有一颗虫牙。
The fruit decayed in the damp weather.
在潮湿的天气下，水果腐烂了。
This tooth is decayed. It must come out.
这颗牙齿龋蚀了，应当拔掉。
Some of her teeth were very badly decayed.
她有些牙齿烂得很厉害。
I had a decayed tooth drawn by the dentist.
牙医给我拔出了蛀牙。
I got a decayed tooth pulled off yesterday.
昨天我让牙医把我的一颗坏牙齿拔掉了。
I got a decayed tooth pulled off yesterday.
我昨天把一颗蛀牙拔了。
Her teeth decayed because she ate too many sweets.
她的牙齿因贪吃甜食而蛀坏。
Her teeth decayed because they were not taken care of.
她的牙齿因没小心保护而变坏了。
Decayed teeth can cause pain and can cost a lot to fill.
侵蚀的牙齿会带来疼痛，并且要花很多钱来修补。
Not only do decayed teeth hurt, they have an awful odor.
蛀牙不能会伤害牙齿，还会产生一种可怕的气味。
I like to drink milk, but the milk in this glass decayed.
我喜欢喝牛奶，但是这只杯子里的牛奶坏了。
This is a sign of life returning to that which has decayed.
这是生命回归到已衰退部位的征兆。
Yesterday I went to the dentist to pull out one of my decayed teeth.
昨天我去牙科医生那儿把我的一颗蛀牙拔掉了。
Why had the Roman Empire grown and why had it so completely decayed?
为什么罗马帝国能够发展壮大？为什么它又那么彻底地衰亡？
I went to the dentist's yesterday to get my decayed tooth pulled out.
昨天我去牙科医生那儿把我的一颗蛀牙拔掉了。
I went to the dentist's yesterday to get my decayed tooth pulled out.
昨天我去牙科医生那儿把我的一颗蛀牙拔掉了。
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