| 释义 |
positrons ˈpɑːzəˌtrɑːnz COCA⁶⁴²⁹⁷BNC⁶⁴¹³⁵
基本例句
n.正电子化正子；正电子原型positron的复数 As Dr Colin described on July9th to the International Cosmic Ray Conference held in Lodz, Poland, the moon blocks electrons and positrons as effectively as it blocks light.
7月9号在波兰罗兹举办的国际宇宙射线大会上，科林博士指出，月球能像阻隔光线那样有效的阻隔电子和正电子。 ecocn
The cloud shows up because of the gamma rays it emits when individual particles of antimatter, in this case positrons, encounter electrons, their normal matter counterpart, and annihilate one another.
反物质云由于其自身发射的伽玛射线而显现出来，当单个的反物质粒子遇到它们正常物质的对应体这里是正电子遇到电子彼此互相消灭了对方。 bj.astronomy.com.cn
The Fermi Space Telescope found hints in 2009 of the telltale pattern associated with positrons in terrestrial gamma rays stemming from lightning storms.
费米太空望远镜在2009年就曾发现这一与正电子有关的特征现象的线索，地点正是在源于雷暴的地表伽马射线中。 yeeyan
The positrons, produced by the decay of radioactive sodium, are cooled into a similarly sized cloud of around1m particles and held in a neighbouring trap.
由放射性钠衰变产生正电子，冷却后形成一个由大约100万个正电子组成的体积同样大小的粒子云团，这团正电子被存放在相邻的一个容器中。 ecocn
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
But discovering the creation of positrons“ gives us a very, very important clue as to what's happening.”
但是发现正电子的增加“给了我们一个非常非常重要的线索来揭示闪电是如何发生的”。 com
By concentrating the energy in space and time, the laser produces positrons more rapidly and in greater density than ever before in the laboratory.
通过在空间和时间上集中能量，激光比之前实验室更快更多地制造出了正电子。 chem8.org
Energetic electrons and positronsantielectrons move out from an inner X-ray ring, which marks a shockwave between different forms of matter, to produce an extended X-ray glow.
高能电子和正电子从一个内部的 X射线环中向外运动，在不同形式的物质中标记出了一个冲击波，产生了一个膨胀的 X射线光。 hjenglish
However, it is unclear whether these positrons can escape from the stellar debris in sufficient quantity to explain the size of the observed cloud.
然而，尚不清楚是否有足够数量的正电子能够逃离恒星残骸以解释观察得到云团的大小。 www.astronomy.com.cn
If the material being tested has no defects in it, the positrons react a little differently.
如果所探测的材料不存在缺陷，正电子则表现得稍有不同。 china-cam
If they are correct, it would explain the newly observed abundance of high-energy positrons.
如果他们假设的模型是对的，这就可以解释新近观察到的大量高能量的正电子。 ecocn
It has developed better techniques for cooling both positrons and antiprotons, which should allow it to trap more anti- atoms.
该小组已开发出冷却正电子和反质子的改进技术，通过应用这些技术应该能够捕获到更多的反原子。 ecocn
Next, an electrical field is used to kick out any remaining positrons and antiprotons.
接着加上一个电场将所有未聚合的正电子和反质子排出这个容器。 ecocn
Normally, it is impossible to distinguish Cherenkov radiation generated by positrons from that created by electrons.
通常由电子还是正电子产生的切伦科夫射线是可以区分开的。 yeeyan
One possible explanation for these positrons is the mutual annihilation of the matter and antimatter forms of a type of dark matter called weakly interacting massive particles, also known as WIMPs.
对这些正电子有一个可能解释，就是它们来自同一种暗物质以正、反物质形式出现的一对粒子的碰撞物质湮灭，这样的暗物质又被称为“大质量弱相互作用粒子” WIMP。 yeeyan
Some astronomers have suggested that exploding stars could produce the positrons.
一些天文学家猜测爆炸的恒星能够产生这些正电子。 www.astronomy.com.cn
The positrons that are generated will move around in the material.
这些正电子将沿着材料周围运动。 china-cam
Their new findings suggest these positrons originate mainly from stars getting devoured by black holes and neutron stars.
他们的新发现表明这些质子主要是在恒星被黑洞和中子星吞噬的过程中产生。 bbs.chinadaily.com.cn
These positrons then come into contact with electrons in the body, and the two annihilate, releasing two gamma-ray photons.
正电子与人体组织中的电子发生作用而湮灭，产生两个伽玛射线光子。 yeeyan
Ultimately, the positrons collide with low momentum electrons in the defect area and are annihilated, thereby releasing energy in the form of gamma rays.
最终，正电子将在缺陷区域与低能量的电子相碰撞并被阳极化，以伽马射线的形式释放能量。 china-cam
When these atoms have a neutron knocked off, they change into an isotope that will actually sit there and decay while producing positrons for a period of time.
原子失去中子后，会变成一种同位素，开始衰减并在一段时间内产生正电子。 china-cam
Positrons and electrons annihilated each other, emitting gamma rays detected by Fermi's gamma-ray burst detector, researchers said.
正电子和电子会相互湮灭而发射出的伽玛射线，再由费米的爆发检测器所检测到，研究人员说。 yeeyan |