There are problems of urban decay and gang violence.
存在都市衰败和黑帮暴力问题。
When not removed, plaque causes tooth decay and gum disease.
牙斑没有清除就会导致蛀牙和牙龈疾病。
If left untreated, decay goes deeper and deeper into the tooth.
如果不及时治疗，蛀牙会越来越深。
After a while, the decay reaches the nerves and blood vessels of the inner tooth.
过了一段时间，蛀坏的部分会蔓延至内牙的神经和血管。
Faustick conducted a two-year survey to find out how to prevent or reduce dental decay.
福斯蒂克进行了一项为期两年的调查，以了解如何预防或减少蛀牙。
What keeps the black-tailed deer alive in the harsher seasons of plant decay and dormancy?
是什么让黑尾鹿在植物腐烂和休眠的严酷季节里存活下来？
The essential condition for the decay of the vacuum is the presence of an intense electric field.
真空衰变的基本条件是存在强电场。
Helium is the by product of millennia of radioactive decay from the elements thorium and uranium.
氦是钍和铀元素数千年放射性衰变的副产品。
The decay of Christian belief and practice is not a loss but rather an opportunity for poetry in Crane.
在克莱恩看来，基督教信仰和践行的衰败，并不是损失，反而是诗歌新生的机会。
Geological dates are usually obtained by using the rates of decay of various radioactive elements found in minerals.
地质年代通常是通过矿物中发现的各种放射性元素的衰变率来获得的。
He pointed out that sugar is a major agent in dental decay, particularly the sugar in sweets, cakes, and soft drinks.
他指出糖是导致蛀牙的主要原因，尤其是糖果、蛋糕和软饮中的糖。
Both it and its companions would then decay almost instantly into a plethora of less fleeting bits, some of which could be detected.
然后，它与它的伙伴们将会几乎在瞬间衰变为大批寿命更短的微粒子，其中有一些能被检测出来。
A nucleus that large cannot be stable, but it might be possible to assemble one next to a vacuum for long enough to observe the decay of the vacuum.
这么大的原子核不可能是稳定的，但在足够长的时间内，在真空附近组装一个原子核以观察真空的衰变是可能的。
These minerals can be dated by radioactive decay techniques because of the very small quantities of radioactive trace elements they, in turn, contain.
这些矿物可以用放射性衰变技术测定年代，因为它们所含的放射性微量元素非常少。
Attack by scavengers and bacteria, chemical decay, and destruction by erosion and other geologic agencies make the odds against preservation very high.
食腐动物和细菌的攻击、化学性腐烂，以及侵蚀和其他地质作用的破坏，导致无法保存的可能性非常大。
He found that the length of time it takes a sound's echo to decay is determined by the absorption of the sound's original energy by surrounding material.
他发现，声音回声衰减的时间长短取决于周围物质对声音原始能量的吸收。
A third sources, the warming-enhanced decay of organic matter in forests and soils, especially in the middle and higher latitudes, is now being recognized as potentially significant.
第三个来源，特别是在中纬度和高纬度地区，森林和土壤中因气候变暖而加剧的有机物腐烂，现在被认为具有潜在的重大意义。
Chemicals are injected into the fruit to reduce decay.
水果注入了化学药品以防腐坏。
It tottered on the borders of senile decay.
它在衰老的边缘摇摇欲坠。
As soon as the oxygen is gone, decay stops and the remaining organic matter is preserved.
当氧气消耗殆尽分解便停止，留下剩余的有机物。
In zones of increased turbulence, the planes' wakes will decay more quickly and the effect will diminish.
在湍流增强的区域，飞机的尾流会消失得更快，它的效果也会减弱。
Nonsense-mediated decay checks for the presence of premature nonsense codons.
无意义介导的衰变检查是否存在过早的无意义密码子。
Recent experimental results defined nature of the hadronic decay puzzle in charmonium physics.
最新实验研究结果在高灵敏度水平上展现了粲夸克偶素物理中的强衰变之谜。
The radioactive displacement law of Fajans and Soddy was formulated to describe the products of alpha and beta decay.
法扬斯和索迪的放射性位移定律被用来描述α和β衰变的产物。
Cavities in teeth are caused by decay.
牙齿上的空洞是由龋蚀造成的。
Radon comes from radium decay.
氡来自镭的衰变。
Over time these proteins decay.
时间久了，这些蛋白质会衰败。
Those brown spots are rot and decay.
那些棕色的斑点是腐烂。
I don't equate dirt with death and decay.
我并不认为污垢就等于死亡和腐臭。
It is resistant to decay but not to Marine borers.
它抗腐烂，但是不抗海洋蛀虫。
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