选牙膏的时候要确保它含有氟化物。
When you're choosing a kind of toothpaste, make sure it has fluoride.
因此，非法进口氯氟化碳的黑市已经扩大。
Consequently, a black market in imported illicit CFC's has grown.
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.
一升茶树含有高达9毫克的氟化物，过量会导致氟骨症，降低骨骼质量，导致疼痛和韧带僵硬。
A litre of teacan contain up to 9mg of fluoride, which in excess can cause skeletal fluorosis, reducing bone quality and causing pain and stiffening of the ligaments.
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.
铍二氟化物极易溶于水，与其它碱土不同。
Beryllium difluoride is very soluble in water, unlike the other alkaline earths.
我们分别采用离子色谱法和氟离子选择电极法对茶叶中氟化物的含量进行测定。
We tested the quantity of fluoride in tea leaves by separately using fluorinion selective electrode and the ion chromatographys.
而用氟化物漱口则能够使其坚固。
现在DEC盐里面还有碘和氟化物。
330千伏的六氟化硫断路器。
我应该给孩子氟化添加物吗？
随着使用量增加，三氟化氮的排放量也将升级。
The emissions will escalate as nitrogen trifluoride's use increases.
这个系统，由林德集团制造，能将氟化氢分解成氟气。
The system, made by Linde, splits hydrogen fluoride into fluorine.
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?
新的空调已经进入到空气，少量的氯氟化碳已被查封。
The new air conditioner is getting into the air, a small amount of CFCs has been sealed.
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.
一些公司选择了接受三氟化氮的替代品来解决这个问题。
Some companies are solving the problem by adopting alternatives to nitrogen trifluoride.
在1955年，瑞士开始向盐中添加氟化物，以防止龋齿。
In 1955, Switzerland began adding fluoride to its salt to prevent dental cavities.
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.
比如，如果你在口服导致口感的药，你可能得每日用氟化剂。
For example, if you are taking medicine that dries your mouth, you may want to use fluoride every day.
很可能氪和氩也可以做路易斯碱，但显然它们不能和氟化氢竞争。
It is possible that Kr and Ar could also act as Lewis bases, but evidently they cannot compete with HF.
随后不久发现了在牙膏中添加氟和氟化物可以加强牙釉质抵御腐蚀。
This was soon followed by the discovery that the addition of fluoride and fluoride compounds to toothpaste would strengthen tooth enamel against decay.
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.
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.
这么说是因为一项新研究表明氟化物形成的保护膜比专家们料想的还有薄。
Because a new study shows that fluoride forms a thinner protective shield than experts thought it did.
六氟化硫是一种温室气体，它与其他物质一道作为某些高压设备的绝缘体。
Take sulphur hexafluoride, a greenhouse gas used-among other things-as an insulator in some sorts of high-voltage equipment.
在世界许多地区，包括非洲、东地中海和南亚，氟化物浓度都有升高趋势。
Fluoride occurs at elevated concentrations in many areas of the world including Africa, the Eastern Mediterranean and southern Asia.
在世界许多地区，包括非洲、东地中海和南亚，氟化物浓度都有升高趋势。
Fluoride occurs at elevated concentrations in many areas of the world including Africa, the Eastern Mediterranean and southern Asia.
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