positron
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n. [物] 正电子，阳电子
n.
正电子；阳电子；
英英释义
positron[ 'pɔzitrɔn ]
n.an elementary particle with positive charge; interaction of a positron and an electron results in annihilation
同义词：antielectron
词组短语
positron emission正电子发射
positron emission tomography[化]正电子成象术；正电子放射断层造影术
positron annihilation正电子湮没；阳电子湮没
双语例句
用作名词(n.)
The result is that the electron shadow and the positron shadow are separated.
结果将使得电子的阴影和正电子的阴影被分开。
The vacancy defects of samples were measured by slow positron annihilation.
借助慢正电子湮没技术研究了样品的空位型缺陷。
权威例句
Positron emission tomography study of human brain functional developmentPositron emission tomographic studies of the cortical anatomy of single-word processing
Preoperative staging of non-small-cell lung cancer with positron-emission tomography
Localization of a human system for sustained attention by positron emission tomography.
18F-2-deoxy-2-fluoro-D-glucose as a tracer in the positron emission tomographic study of senile dementia
Use of positron emission tomography for response assessment of lymphoma: consensus of the Imaging Subcommittee of International Harm...
Schizophrenia and cognitive dysmetria: a positron-emission tomography study of dysfunctional prefrontal-thalamic-cerebellar circuitry.
Coronary flow reserve calculated from pressure measurements in humans. Validation with positron emission tomography
The effect of divided attention on encoding and retrieval in episodic memory revealed by positron emission tomography
Age-Related Differences in Neural Activity during Item and Temporal-Order Memory Retrieval: A Positron Emission Tomography Study
positron (n.)
1933, coined from posi(tive) (elec)tron.
1. Some of these gamma rays pass near atomic nuclei, in the process transforming into an electron and a positron, researchers said.
某些伽马射线在靠近原子核的附近经过，进入到转化为个电子和正电子的过程，研究人员说。
article.yeeyan.org
2. PET, or positron emission tomography, is an imaging study that allows doctors to evaluate the use of certain substances by the brain.
即正电子放射断层摄影术，是一项成像研究，它能使医生评价大脑对某些物质的使用。
article.yeeyan.org
3. Blackett was really the first to obtain hard evidence for the existence of a positron but he was afraid to publish it.
布莱克特几乎是第一个发现正电子存在的有力证据的人，但他却没敢发表这个结果。
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4. Recently, however, researchers have used modern PET (positron emission tomography) scanners -- which detect tissue that is actively absorbing sugar -- to search for deposits of brown fat in adults.
然而，最近研究人员利用现代PET（正电子发射断层）扫描，检测那些积极吸收糖类的组织，以寻找成人棕色脂肪的沉积。
scifans.com
5. To the electron, the corresponding system is the positron, which was observed after the prediction in cosmic ray experiments by Anderson in 1932.
对电子来说，与其相对应的是正电子，后者被安德森于1932年在宇宙射线实验中发现。
article.yeeyan.org
6. Later, electron and positron pairs were actually produced in laboratory experiments.
之后，电子与正电子对也最终在实验室中被制造出来。
article.yeeyan.org
7. The AEBB-2000 accelerator is a unique facility for carrying out experiments with anti-parallel electron-positron beams of high energies.
AEBB-2000加速器是一部独一无二的设备，它能实现高能量的反平行电子-正电子束试验。
article.yeeyan.org
8. The new collider has to provide exact measurements of electron-positron annihilation.
新型的对撞机必须提供电子-正电子湮灭的准确测量结果。
article.yeeyan.org
9. The result is that the electron shadow and the positron shadow are separated.
这样的结果就是电子带和正电子带将被分开。
article.yeeyan.org
10. One way to create such short bursts of gamma rays is through the collision -- and subsequent annihilation, as the mass of those particles converts into energy -- of an electron and a positron.
制造伽马射线短脉冲的一种方法，是电子与正电子的碰撞——之后的湮灭，使粒子的质量转化为能量。
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11. So while an electron has a negative charge, its antimatter counterpart, a positron, has a positive charge and they annihilate each other when they get too close.
所以，电子带负电，那它对应的反物质正电子就带正电，并且它俩如果靠太近就会湮灭掉。
article.yeeyan.org
12. The studies combined images taken with positron-emission tomography, or PET machines, with those from computed tomography, or CT machines, to identify the brown fat.
研究综合使用了正电子发射断层成象仪(PET)以及断层扫描成象仪(CT)，以识别褐色脂肪。
www.ebigear.com
13. It was a very difficult first step to accept the positron.
接受正电子是艰难的第一步。
article.yeeyan.org
14. Positron emission tomography (PET) is an emerging modality in lung cancer staging.
正电子放射断层造影术（PET）是新兴的适用于肺癌分期的检查方法。
article.yeeyan.org
15. It was left to Anderson to first publish the evidence for the existence of a positron and to scoop the credit for the discovery of the positron.
而第一个发表正电子存在的证据并被冠以正电子发现人这一称号的的人则变成了安德森。
article.yeeyan.org
16. Positron and electron (particle and anti-particle) can annihilate in collision turning into electromagnetic radiation.
正电子和电子（粒子和反粒子）在对撞中会发生湮灭，并产生电磁辐射。
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17. And they did an imaging test called positron emission tomography or PET to test for brain function by looking to see how well the brain uses glucose or sugar.
他们做了一个成像测试正电子发射断层或PET测试脑功能，看看大脑是如何使用好葡萄糖或糖。
article.yeeyan.org
18. Twenty minutes into the call, clinicians injected a radioactive form of sugar into each person, then began imaging their brains with a Positron Emission Topography machine.
通话20分钟后，医生给每个人注射一种具有放射性的糖，然后利用正电子发射断层摄影仪对他们的大脑进行扫描。
article.yeeyan.org
19. The scans, which used a technique called positron emission tomography (PET), were designed to monitor changes in the way the brain metabolised glucose, the fuel it needs to function.
扫描利用了一种叫做正电子发射X射线层析照相术(PET)的技术。 扫描用以监测脑中代谢葡萄糖（脑正常工作需要的营养物）的变化。
article.yeeyan.org
20. Luc De Nil, of the University of Toronto, has been poring over stutterers’ brains using positron emission tomography and functional magnetic resonance imaging.
来自多伦多大学的LucDeNil通过正电子放射扫描术和功能性磁共振造影术仔细研究了口吃者的大脑。
article.yeeyan.org
21. Twenty minutes into the call, clinicians injected a radioactive form of sugar into each person, then began imaging their brains with a Positron Emission Topography machine.
通话状态保持20分钟以后，临床医生给每位实验对象注射了一种具有放射性形态的糖类，然后使用正电子发射计算机对他们的脑部进行成像。
article.yeeyan.org
22. In women with PMDD, studies have shown a correlation between self-reported emotional distress and levels of a serotonin precursor as measured by Positron emission tomography (PET).[29]
对患有经前不悦症的妇女群体的研究显示，自述的情绪上的痛苦与正电子发射断层扫描仪（PET）测量的5-羟色胺前体水平二者之间具有一定的相关性。
article.yeeyan.org
23. Lisa Mosconi and colleagues at the New York University School of Medicine used positron emission tomography, or PET, scans to look at the brains of 53 normal elderly people.
美国纽约大学医学院的莉萨·墨斯科尼和其同事使用正电子发射断层成像(Positron EmissionTomography,PET)技术，对53名正常的中老年人进行了脑部扫描。
edu.sina.com.cn
24. Lisa Mosconi and colleagues at the New York University School of Medicine used positron emission tomography, or PET, scans to look at the brains of 53 normal elderly people.
美国纽约大学医学院的莉萨·墨斯科尼和其同事使用正电子发射断层成像(Positron EmissionTomography,PET)技术，对53名正常的中老年人进行了脑部扫描。
edu.sina.com.cn
25. After injecting FDDNP, they used positron emission tomography (PET) scans, which can show how tissue is acting by measuring its use of sugar for basic energy.
在为受试者注射FDDNP以后，他们使用了正电子发射x线断层扫描仪，该方法是依据对组织利用糖作为基础能量的测定，来显示组织活动情况。
-- 来源 -- 汉英 - 翻译参考
26. The positron is an antielectron.
正电子就是反电子。
-- 来源 -- 英汉 - 辞典例句
27. positron scintigraphy
正电子闪烁照相法
-- 来源 -- 英汉 - 短句参考
28. positron factory
正电子工厂
-- 来源 -- 英汉 - 翻译参考[网络]
29. positron annihilation spectroscopy
正电子湮没谱学
-- 来源 -- 英汉 - 短句参考
30. An electron with a negative charge, as contrasted with a positron.
电子带有负电荷，与正电荷相反的电子
-- 来源 -- 英汉 - 短句参考
31. positron radiation
正电子发射
-- 来源 -- 英汉 - 翻译参考[网络]
32. A short - lived association of an electron and a positron bound together in a configuration resembling the hydrogen atom.
电子偶素，正电子素电子与正电子的短暂结合物，两者的结合物与氢原子的结构十分相似
-- 来源 -- 英汉 - 短句参考
33. positron annihilation
正电子湮没
-- 来源 -- 英汉 - 短句参考
34. To participate in annihilation, as do an electron and a positron.
湮灭，湮没湮灭，如电子与正电子
-- 来源 -- 英汉 - 短句参考
positron
