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。
Element 43 has a very fast rate of decay.
43号元素的衰变速度非常快。
The result is tooth decay and gum disease.
后果就是产生蛀牙和牙龈疾病。
He pointed out that sugar is a major agent in dental decay.
他指出糖是蛀牙的主要原因。
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。
This might explain why 11% of rabbits are suffering from tooth decay.
这也许可以解释为什么11%的兔子患有蛀牙。
Sugarless yogurt could help beat bad breath, tooth decay and gum disease.
无糖酸奶有助于缓解口腔异味、蛀牙和牙龈疾病。
In addition to tooth decay, there are also gum diseases to watch out for.
除了蛀牙之外，还需要注意牙龈疾病。
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？
Sugarless yoghurt could help beat bad breath, tooth decay and gum disease, say scientists.
科学家们发现，无糖酸奶有助于缓解口腔异味、蛀牙和牙龈疾病。
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。
The landlord had let the building fall into decay.
房东不管，房子已经破烂不堪。
Chemicals are injected into the fruit to reduce decay.
水果注入了化学药品以防腐坏。
Buildings are left to decay at the mercy of vandals and the weather.
这些建筑物因人为的肆意破坏和日晒雨淋而破败不堪。
Up there were the same signs of decay.
上面也是同样破落的景象。
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