| 释义 |
pos·i·tron 英ˈpɒzɪˌtrɒn美ˈpɑzɪˌtrɑnAHDpŏzʹĭ-trŏn' 高COCA³⁸⁸⁰²BNC⁶²⁵⁰²iWeb²⁹⁰⁰³Economist⁴¹³⁰³⁺²
基本英英词源搭配记法近义反义派生词例句例句
n.正电子¹⁰⁰复数positrons
Noun:
an elementary particle with positive charge; interaction of a positron and an electron results in annihilation缩写自positive electron.positron-emission tomography正电子放射断层造影术…positron radiation正电子辐射,阳电子辐…positron camera阳电子照相机,正电子…positron annihilation阳电子湮没electron-positron field阴阳电子场positron emission正电子放射positron emitter正电子发射体…positron decay阳电子衰变
posi-tron⇒n.正电子近义词 antielectron反电子
Ppositroniumn.电子偶素正电子素阳电子素
名词100%
用作名词The result is that the electron shadow and thepositronshadow 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 slowpositronannihilation.借助慢正电子湮没技术研究了样品的空位型缺陷。 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。 yeeyan
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。 yeeyan
The electron, for example, has negative charge, whilst its antiparticle, called the positron, has positive charge.
举例说明，比如电子带负电荷，同时，它的反粒子被称作正电子—带有正电荷。 iciba
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。 yeeyan
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。 yeeyan
A positron is an anti- electron, a mirror-image particle with the same properties as an electron, but an opposite, positive charge.
一个正电子则是一个反电子，即与一个电子有相同属性的镜象粒子，只是其电荷性质相反即带正电荷。 dxy
And although Asimov's“ positronic” brains do not exist, positrons are indeed used to probe human brains in positron-emission tomography PET scanning.
虽然阿西莫夫虚构的“正电子”大脑并不存在，但是正电子理论确确实实被应用于正电子衍射成像 PET扫描技术上用来探索人类大脑。 ecocn
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。 yeeyan
For decades, physicists at CERN and elsewhere have been trying to overcome these limitations with antihydrogen, which consists of a single positron orbiting a single antiproton.
几十年来，欧洲核子研究中心和其他地方的物理学家一直在想方设法克服反氢原子的这些局限。 反氢原子由一个正电子与一个反质子构成，正电子绕反质子运行。 ecocn
It is shown that the positron annihilation technique is a powerful method for investigating the structure of the defects in metal.
可以看出，正电子湮没技术是研究金属微观缺陷结构的有力手段。 cnki
It was a very difficult first step to accept the positron.
接受正电子是艰难的第一步。 yeeyan
It can be found that the intensity of positron lifetime of barium vacancy goes through maximum as the donor content increases.
结果表明，自由钡空位的正电子寿命强度随施主含量的增加而经历一极大值。 cnki
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。 yeeyan
Luc De Nil, of the University of Toronto, has been poring over stutterers’ brains using positron emission tomography and functional magnetic resonance imaging.
多伦多大学的卢克.德.尼尔已经用正电子发射断层扫描和功能性磁共振成像仔细研究了口吃者的大脑。 ecocn
Secondly, research using positron emission tomography PET scans has shown that in order for a person to reach orgasm, a primary requirement is to let go of“ all fear and anxiety.”
第二，正电子断层扫描 PET研究表明，一个人要达到高潮，其必要的条件是放下“所有的恐惧和焦虑”。 yeeyan
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。 yeeyan
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。 yeeyan
The electron- positron pair may survive without recombining.
电子-正电子偶可以存在下来而不再复合。 kuenglish
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。 ebigear
The technology recently blossomed following passing a technical hurdle of altered positron movement in strong magnetic field thus affecting the resolution of PET images and attenuation correction.
最近的技术蓬勃发展，以下通过在强磁场，从而影响 PET图像分辨率和衰减校正领域的改变正电子的运动技术障碍。 cmasit
These experimental results give the corresponding positron experiment data for the application of cuprate superconductors and study of the mechanism.
该研究结果为铜氧化物超导体的应用和机理研究提供了相应的正电子实验资料。 cnki
To the electron, the corresponding system is the positron, which was observed after the prediction in cosmic ray experiments by Anderson in1932.
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。 yeeyan
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。 yeeyan
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。 yeeyan
Positron emission tomography imaging was performed to measure specific microvascular blood flow at rest and during pharmacological vasodilation by IV dipyridamole.
在患者安静状态下和在使用潘生丁时，用正电子发射断层摄影测量其特殊微血管血流速。 dxy
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。 yeeyan |