| 单词 | halogen |
| 释义 | halogen noun[C] uk/ˈhæl.ə.dʒen/us/ˈhæl.ə.dʒen/amemberof agroupof fiveparticularchemicalelements: 卤素Chlorine andiodineare halogens.氯和碘都是卤素。 Chemical elements
halogen| American Dictionaryhalogen noun[C] us/ˈhæl·ə·dʒən/chemistry any of agroupof fivechemicalelementsthatcombinewithhydrogento makesubstancesfrom whichsalts(=substancesmade with anacid)can be made Examplesofhalogenhalogen The halogens, with their large electron affinities, are the best negative ion candidates. From theCambridge English Corpus To prevent damage by the calorific source of thehalogenlamp, during illumination the spinal cord was bathed with saline solution. From theCambridge English Corpus Second, the intensity of the tungstenhalogenlamps could be reduced in order to lower the thermal heating of plant canopies. From theCambridge English Corpus However, this is not the case in thehalogenlight, and so we have to reflect this uncertainty into the distance reading. From theCambridge English Corpus There are perhaps two ways to solve the potential thermal issues with tungstenhalogenlamps. From theCambridge English Corpus Although there are many electronegative elements, only the halogens have sufficiently large electron affinities to render current densities of this magnitude likely. From theCambridge English Corpus In the first volume, he had already covered the halogens and the alkaline metals. From theCambridge English Corpus We have no analyses for hydrogen and halogens, thus all analyses are based on 23 oxygens (46 negative charges in the silica-oxygen framework). From theCambridge English Corpus Thus, the times that plants are imaged with a remote sensing system that utilizes tungstenhalogenlamps is limited. From theCambridge English Corpus It also appears that modifications of positive ion source technology are likely to result in adequate negative ion current densities from these halogens. From theCambridge English Corpus A robot is instructed to replace the bulb of ahalogenlamp. From theCambridge English Corpus Dating of the alteration should be coupled with methods that identify the waters involved (stable isotopes, noble gases, halogens). From theCambridge English Corpus The test light beam from ahalogenlamp was guided to the retina from above. From theCambridge English Corpus Two different tracers were used to observe flow patterns, using uniform illumination provided byhalogenlamps. From theCambridge English Corpus 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. |
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