| 词汇 | halogen |
| 释义 | halogen noun[ C ] uk /ˈhæl.ə.dʒen/ us /ˈhæl.ə.dʒen/ a member of a group of five particular chemical elements: 卤素 Chlorine and iodine are halogens.氯和碘都是卤素。 Chemical elements actinium alkali metal americium astatine berkelium brimstone bromine calcium fluorine germanium iodine lithium manganese nickel plutonium quicksilver selenium silicon sodium transition metal halogen | American Dictionaryhalogen noun[ C ] us/ˈhæl·ə·dʒən/ chemistry any of a group of five chemical elements that combine with hydrogen to make substances from which salts (= substances made with an acid) can be made Examples of halogenhalogen The halogens, with their large electron affinities, are the best negative ion candidates. To prevent damage by the calorific source of the halogen lamp, during illumination the spinal cord was bathed with saline solution. Second, the intensity of the tungsten halogen lamps could be reduced in order to lower the thermal heating of plant canopies. However, this is not the case in the halogen light, and so we have to reflect this uncertainty into the distance reading. There are perhaps two ways to solve the potential thermal issues with tungsten halogen lamps. Although there are many electronegative elements, only the halogens have sufficiently large electron affinities to render current densities of this magnitude likely. In the first volume, he had already covered the halogens and the alkaline metals. We have no analyses for hydrogen and halogens, thus all analyses are based on 23 oxygens (46 negative charges in the silica-oxygen framework). Thus, the times that plants are imaged with a remote sensing system that utilizes tungsten halogen lamps is limited. It also appears that modifications of positive ion source technology are likely to result in adequate negative ion current densities from these halogens. A robot is instructed to replace the bulb of a halogen lamp. Dating of the alteration should be coupled with methods that identify the waters involved (stable isotopes, noble gases, halogens). The test light beam from a halogen lamp was guided to the retina from above. Two different tracers were used to observe flow patterns, using uniform illumination provided by halogen lamps. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
| 随便看 |
反思网英语在线翻译词典收录了377474条英语词汇在线翻译词条，基本涵盖了全部常用英语词汇的中英文双语翻译及用法，是英语学习的有利工具。