网站首页  词典首页

请输入您要查询的英文单词：

　

单词 positron
释义
positron
noun[C]
physicsspecialized
uk
/ˈpɒz.ɪ.trɒn/us
/ˈpɑː.zɪ.trɑːn/
anextremelysmallpieceofmatterwith apositiveelectricalcharge, having the samemassas anelectron
正电子，阳电子
SMART Vocabulary: related words and phrases
Electricity & electronics
  • anti-static
  • bitstream
  • brownout
  • capacitance
  • chargeable
  • charged
  • conduct
  • electromagnetism
  • generate
  • hydropower
  • negatively
  • non-electric
  • non-electrical
  • non-electronic
  • non-polar
  • photoelectric
  • piezoelectric
  • pylon
  • resistance
  • shock
See more results »

You can also find related words, phrases, and synonyms in the topics:

Physics: atoms, molecules & sub-atomic particles
(Definition ofpositronfrom theCambridge Advanced Learner's Dictionary & Thesaurus© Cambridge University Press)

positron| American Dictionary

positron
noun[C]
us/ˈpɑz·ɪˌtrɑn/
physics
a verysmallpieceofmatterwith apositiveelectricalcharge, and with the samesizeas anelectron
(Definition ofpositronfrom theCambridge Academic Content Dictionary© Cambridge University Press)

Examplesofpositron

positron
Following their emission, positrons travel for a short distance that is defined by their energy and the surrounding tissue.
From theCambridge English Corpus
This effect decreases when the number of positrons increases.
From theCambridge English Corpus
When using carbon, however, the carbon 11 isotopes produced by fragmentation arepositronemitters.
From theCambridge English Corpus
Planning and spatial working memory : apositronemission tomography study in humans.
From theCambridge English Corpus
Their spatial patterns are significantly modified by the presence of thepositroncomponent.
From theCambridge English Corpus
It is seen that an addition of minute quantities of positrons abruptly reduces the net negative charge of the dust grain.
From theCambridge English Corpus
After an encounter with a shock wave, some positrons are reflected and then accelerated along the magnetic field.
From theCambridge English Corpus
Further, we find that some particles in anotherpositronbunch are accelerated by the parallel electric field.
From theCambridge English Corpus
The resulting bremsstrahlung cascade in the solid target produces high energy bremsstrahlung,positron-electron pairs, and photonuclear reactions in the target material.
From theCambridge English Corpus
The generation of hard bremsstrahlung, photonuclear reactions, and preliminary evidence forpositron-electron pair production will be discussed.
From theCambridge English Corpus
Changes in regional brain glucose metabolism measured withpositronemission tomography after paroxetine treatment of major depression.
From theCambridge English Corpus
Abnormalities in brain glucose metabolism were examined using functional neuroimaging withpositronemission tomography.
From theCambridge English Corpus
Recalling word lists reveals ' cognitive dysmetria ' in schizophrenia : apositronemission tomography study.
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.
#https://dictionary.cambridge.org//dictionary/english/positron##
随便看

　

英汉词典包含213609条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。

　

Copyright © 1999-2024 qbania.com All Rights Reserved
更新时间：2024/12/28 1:26:43