大气中三氟化氮的浓度大约为0.5万亿分之一(ppt)，使得它很难测定。
The concentration of nitrogen trifluoride in the atmosphere is about 0.5 part per trillion, making it very hard to measure.
在氟化钾催化下，芳香醛与氰乙酸乙酯发生克脑文格尔缩合反应，得到高产率的缩合产物。
The knoevenagel condensation of aromatic aldehydes with ethyl cyanoacetate proceeds smoothly in the presence of potassium fluoride giving products in high yield.
空气化工产品公司宣称全球的三氟化氮产量已经达到7300公吨。
Air Products claims that worldwide production of nitrogen trifluoride has reached 7, 300 metric tons.
在一种新型的强力防水高氟化聚合物表面上水滴和油滴可以自由滚落。
Both water and oil droplets roll off this new class of highly fluorinated super-repellent polymers.
所以在每层材料放置好之后，氮氟化物就被泵进工作舱中并分散开来，释放出高活性的氟原子来清洁墙壁。
So after each layer is deposited, nitrogen fluoride is pumped into the chamber and is split to release highly reactive fluorine atoms that clean the walls.
他们确认为了牙齿健康，氟化物的普遍可获得性是人类享有健康的基本权利之一。
They confirmed that universal access to fluoride for dental health is a part of the basic human right to health.
国内外大量研究与观察证明饮水氟化是最安全、投入产出比最佳的预防龋齿的公共卫生措施。
Many studies and observations have demonstrated that drinking water fluoridation is the safest and the most economical public healthy measure.
乳牙配方的牙膏含有低浓度的氟化物，宝宝使用它平安可靠的同时可以有效维护乳牙的珐琅质以防止蛀牙的发生。
Macleans Milk teeth toothpaste contains low levels of fluoride which is safer for young children, whilst effectively strengthening first teeth's enamel and protecting against tooth decay.
在这个阶段，牙齿可以借助唾液中的氟化物和矿物质修复脆弱的部位。
At this stage, the tooth can repair the weakened area with the help of fluoride and minerals in saliva.
根据韦斯博士尚未发表的数据，六氟化硫目前的排放量是框架公约下所报告的排放量的四倍。
According to Dr Weiss's as-yet-unpublished figures, about four times as much of it is being emitted as is reported under the framework convention.
普莱瑟说我们现在应当密切关注大气中的三氟化氮含量。
Prather says we should now be following nitrogen trifluoride concentrations in the atmosphere closely.
他发现2006年中有大约563公吨的三氟化氮被排放。
He found that about 563 metric tons of nitrogen trifluoride was emitted in 2006.
对这一问题尤其需要加以指导，因为在所有天然水中都可发现达到某一浓度的氟化物。
Guidance is particularly needed because fluoride is found in all natural waters at some concentration.
“太阳能板容量每增加一兆瓦，就需要一吨的三氟化氮来清洗设备。”皮尔格林说。
"For every megawatt of solar panel capacity, you'll need a ton of NF3 for cleaning the equipment," Pilgrim says.
你的牙科保健里需要包括氟化物处理和窝沟封闭术吗？
Should your dental care include fluoride treatments or dental sealants?
这样能使能量消耗比使用三氟化氮时更少，而且没有促进全球变暖的危险，皮尔格林说。
That takes less energy than splitting nitrogen fluoride and there is no global warming risk, Pilgrim says.
三氟化氮(NF 3)主要被半导体工业用于清洗制造硅芯片的工作舱。
Nitrogen trifluoride (NF3) is used mainly by the semiconductor industry to clean the Chambers in which silicon chips are made.
氟化物是防止牙齿受侵蚀的最好防护物！
我们都用水清洁牙齿，但一刷完牙就漱口，就会漱掉很多氟化物，极大降低牙膏的功效。
We all use water to clean our teeth but swishing water in your mouth too soon after brushing washes away much of the fluoride with it and minimises your toothpaste's effectiveness.
环境保护署称，它的发现是基于对六种温室气体的极其严格科学评判而做出的，这六种气体包括：二氧化碳，甲烷，一氧化二氮，氢氟碳化物，全氟碳化物以及六氟化硫。
The EPA said its finding was based on a rigorous review of science on six greenhouse gases: carbon dioxide, methane, nitrous oxide, hydrofluorocarbons, perfluorocarbons and sulfur hexafluoride.
氟化物可以强化生长中的牙齿，这是已证明的事实。
It is a proven fact that fluoride strengthens growing teeth.
这靠一种化学结构类似于聚四氟乙烯的氟化高聚物实现。
This is done with a fluoropolymer-a chemical similar in structure to Teflon.
美国牙医协会(ada)建议给不具备最佳饮用含氟水的社区中的儿童补充氟化物。
The American Dental Association (ADA) recommends fluoride supplements for children who live in communities that don't have optimally fluoridated drinking water.
含镓氟化物玻璃具有较其它氟化物玻璃更宽的红外透过范围和更低的声子能量，显示出其是一种优质的激光基质材料。
Fluorogallate glass is a favorable kind of material for optical fiber lasers with transmitting infrared light at longer wavelength and lower phonon energy.
《饮用水中的氟化物》是世卫组织系列专著之一，这些专著论述对饮用水中的其他化学品的管理，比如砷或微囊藻毒素。
Fluoride in Drinking-water is one out of a series of WHO monographs, which address the management of other chemicals in drinking-water, such as arsenic or cyanotoxins.
虽然从饮用水中去除过量氟化物可能很困难并且费用高昂，但仍然存在可在地方一级采取的费用低廉的解决办法。
Although removal of excessive fluoride from drinking-water may be difficult and expensive, low-cost solutions that can be applied at a local level do exist.
尽管有如此的潜在后果，三氟化氮的使用并没有被控制，电子公司也没有被要求记录其使用量或逸出量。
Despite its potential consequences, the gas is not regulated and electronics companies are not required to keep a record of how much they use or emit.
尽管有如此的潜在后果，三氟化氮的使用并没有被控制，电子公司也没有被要求记录其使用量或逸出量。
Despite its potential consequences, the gas is not regulated and electronics companies are not required to keep a record of how much they use or emit.
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