At least 17,000 metric tons of fluorine are produced each year.
一个是水循环,另一个是氟循环。
One is the water cycle and the other is the fluorine cycle.
含铅和氟Midgley.
TEL and freon Midgley.
熔融氟化盐具有良好的传热特征和很低的蒸汽压力,这样就降低了对容器和管道的应力。
Molten fluoride salts have excellent heat transfer characteristics and a very low vapor pressure, which reduce stresses on the vessel and piping.
氟化镁是在薄层的光学增透膜使用的许多材料之一,但大多数显微镜制造商现在生产自己的专利配方。
Magnesium fluoride is one of many materials utilized in thin-layer optical antireflection coatings, but most microscope manufacturers now produce their own proprietary formulations.
Fluorine 18 is then fed into a reactor where we proceed with a nucleophilic substitution to attach the isotope on a glucose molecule.
含氟的天然有机化合物很少见,因为生物体-除少数例外-不会产生它们。
Natural organic compounds that contain fluorine are rare because living organisms- with a few exceptions- do not produce them.
在美国,氟是添加到饮用水,因为它被认为可以减少蛀牙。
In the United States, fluoride is added to the drinking water, because it was thought to reduce tooth decay.
编制全氟辛烷磺酸及其盐类以及全氟辛基磺酰氟替代品评估初步报告草案、并提供给工作组成员。
Draft a preliminary report on the assessment of alternatives to PFOS, its salts and PFOSF and make it available to the working group members.
除了众所周知的氢,碳,氟和磷的观察之外,它还可以用于许多其他元素。
In addition to the well-known observation of hydrogen, carbon, fluorine and phosphorous it can be used on a large number of other elements.
部分氟化替代品(氟调聚物)也被认为具备足够性能;.
Partially fluorinated alternatives(fluorotelomers) are considered to have shown sufficient properties;
全氟辛烷磺酸、其盐类和全氟辛基磺酰氟替代品评估工作报告草案的摘要载于本说明的附件。
A summary of the draft report on the assessment of alternatives to PFOS, its salts and PFOSF is set out in the annex to the present note.
随着国民经济和国防建设的快速发展,氟塑料研发基地将面临更多的机遇和挑战。
With the rapid development of national economy and national defense, we will face more opportunities and challenges the research and development base of fluorine plastics.
饮用水中砷和氟过量正影响着亚洲、非洲和拉丁美洲40多个国家的人民。
Excess arsenic and fluoride in drinking water now affect people in over 40 countries in Asia, Africa and Latin America.
气候体公约》指南鼓励缔约方将全氟化合物方面的信息列入国家清单,这方面涵盖的是PFC和SF6排放量。
(c) The UNFCCC guidelines encourage Parties to include in their national inventories information on fully fluorinated compounds, which cover PFC and SF6 emissions.
秘书处请各缔约方提交关于全氟辛烷磺酸、其盐类和全氟辛基磺酰氟的替代品的资料.
Secretariat invites parties to submit information on alternatives to PFOS, its salts and PFOSF.
但它也含有220万吨有害的铅化合物以及汞、镉、铬和4400吨含氯氟烃气体。
But it also included 2.2 million tons of harmful lead compounds, as well as mercury, cadmium and chromium, and 4,400 tons of ozone-gobbling chlorofluorocarbon(CFC) gases.
主要原因是机械温控器漏氟,或感温头不能感受到温度,电脑美的冰箱的控制电路板故障。
The main reason is leakage of fluorine mechanical thermostat or temperature sensor can not feel the temperature control circuit board fault computer refrigerator.
对往水中加氟的研究已经开展了60多年,水中加氟已被证明能减少龋齿40%到60%。
The addition of fluoride to water has been researched for over 60 years, and water fluoridation has been proven to reduce decay by 40 to 60 percent.
氟橡胶(FKM)在200°C(390°F)的正常工作温度下非常稳定并且无害。
Fluoro rubber(FKM) is very stable and harmless up to normal operating temperatures of 200 °C(390 °F).
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