查询词典 positrons

Beta particle s are either electrons or positrons.

粒子可以是电子或正电子。

If they are correct, it would explain the newly observed abundance of high-energy positrons.

如果他们是正确的，这将会给新近发现的大量高能量正电子一个合理的解释。

And it has collected low-energy positrons which are the antimatter equivalent of electrons.

并收集了低能量正电子的反物质是相当于电子。

Barry Barish:It's a machine that will collide electrons and positrons.

巴里·巴里斯：这是对撞电子和正电子的机器。

In third chapter, We extend Horowitz and Maldacena's proposal about black hole final state to Dirac fields and find that if annihilation of the infalling positrons and the collapsed electrons inside the horizon is considered, then the nonlinear evolution of collapsing quantum state will be avoided.

在第三章中，我们把Horowitz和Maldacena关于黑洞终态的假设推广到了Dirac场并发现如果考虑黑洞蒸发过程中落进视界的负能粒子同黑洞物质之间的湮灭，那么出射态的非线性演化可以避免。

In third chapter, We extend Horowitz and Maldacenas proposal about black hole final state to Dirac fields and find that if annihilation of the infalling positrons and the collapsed electrons inside the horizon is considered, then the nonlinear evolution of collapsing quantum state will be avoided.

在第三章中，我们把Horowitz和Maldacena关于黑洞终态的假设推广到了Dirac场并发现如果考虑黑洞蒸发过程中落进视界的负能粒子同黑洞物质之间的湮灭，那么出射态的非线性演化可以避免。

So that it can be considered as that all materials can all be composed and transformed unitedly time after time by electrons and positrons.

因而，可以认为：一切物质都是统一由&电子&与&正电子&逐次组合、转变而成。

In positron emission tomography , or PET, a patient ingests or is injected with a slightly radioactive substance that emits positrons, which can be monitored as the substance moves through the body.

在正电子发射X射线摄影技术中，病人要咽下或被注射一些有少许放射性的物质来发出正电子。当这些物质在人体内运动时，正电子可被监测到。

Meanwhile Pierre Colin of the Max Planck Institute for Physics in Munich and his colleagues reckon that the shadow of the moon could be used to help work out whether the abundance of positrons actually does come from annihilating dark matter, using telescopes that look for Cherenkov radiation —flashes of light in the sky—that are created when cosmic rays, in the form of high-energy electrons and positrons, hit the upper atmosphere.

同时，在慕尼黑的马普物理研究所的皮埃尔·科林和他的同事们指出：可以用望远镜观测月球阴影下的切伦科夫辐射现象来判断大量的正电子是否的确来自湮灭的暗物质。切伦科夫辐射现象，是指带有高能量的电子和正电子的宇宙射线，撞击外层大气层时在天空中产生的闪光现象。

Meanwhile Pierre Colin of the Max Planck Institute for Physics in Munich and his colleagues reckon that the shadow of the moon could be used to help work out whether the abundance of positrons actually does come from annihilating dark matter, using telescopes that look for Cherenkov radiation —flashes of light in the sky—that are created when cosmic rays, in the form of high-energy electrons and positrons, hit the upper atmosphere.

与此同时，在慕尼黑的马普物理研究所的皮埃尔？科林和他的同事们指出：在用望远镜观测切伦科夫辐射现象时，月球阴影可以帮助判断大量的正电子是否的确来自暗物质湮灭。切伦科夫辐射现象，是指带有高能量的电子和正电子的宇宙射线，撞击外层大气层时在天空中产生的闪光现象。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。