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The antielectron, or positron, was discovered in 1932.

,是在1932年被发现。

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Objective To evaluate the value of 18 F-deoxyglucose (FDG) positron emission tomography (PET) in detecting the primary focus of metastatic cancer with an unknown primary.

探讨18F-脱氧葡萄糖(FDG)正发射型体层摄影术(PET)全身显像在发灶不明转移癌中作用。

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The key of this technology depended on increasing batteries positron electrode -- zincous -- the electron that can carry.

这项技术重点在于增加了极——阳极——所能

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The nuclide chart involves electron, positron, antiproton, antineutron, photon to exhibit the symmetry of mass and charge ideally.

该核素图将、反质、反中和光收录在内,完美地表现了质量和对称性。

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经济学人-科技

Luc De Nil, of the University of Toronto, has been poring over stutterers' brains using positron emission tomography and functional magnetic resonance imaging.

多伦多大学卢克∙德∙尼尔已经用发射断层扫描和功能性磁共振成像仔细研究了大脑。

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经济学人(汇总)

These may be an electron and its antimatter equivalent, a positron, or two heavier leptons, a muon and an antimuon.

它们可能是一个子和它反物质等价物,一个,或两个更重轻子,一个介子和一个反介子。

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科学60秒 听力 2014年9月合集

Positrons are the antimatter counterparts to electrons.

反物质。

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宇宙奥秘

As early as 1932, the first positrons or anti electrons were discovered in cosmic rays and in 1955, scientists from Berkeley managed to obtain anti protons.

早在1932年,在宇宙射线中发现了第一批或反子,1955年,伯克利科学家们成功地获得了反质子。

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Scishow 精选系列

A positron for example is just like an electron but it has positive charge.

比如一个,就是一个子,但是带有一个单位正荷。

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科学60秒 听力 2014年9月合集

Normal astrophysical processes create some positrons, but not as many as AMS registered.

正常天体物理运动会产生一些,但数量不及阿尔法磁谱仪中记

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年谢尔顿 第七季

You wrote that article on the positron.

你写过关于那篇文章。

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超女 第02季 S02

The positron cannon is ready to fire, and you're safe.

炮已准备好开火 你安全了。

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PBS趣味科普

Down below, uranium is getting split apart and releasing a bunch of heat, radiation, and high-speed particles, like negatively-charged electrons, and their positively-charged counterparts, known as positrons.

在下面,铀正在分裂,释放出一堆热、辐射和高速粒子,比如带负子和带正子,称为

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生活大爆炸 第2季

So what? His observation of highenergy positrons has provided the first conclusive evidence for the existence of galactic dark matter.

怎么样?他对高能点子观察报告首次确切证明了银河暗物质存在。

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Oppenheimer's early research was devoted in particular to energy processes of subatomic particles, including electrons, positrons, and cosmic rays.

奥本海默早期研究特别致力于亚原子粒子,包括子、和宇宙射线能量过程。

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宇宙奥秘

Thus, humanity recognized the positron, a positively charged copy of the electron.

因此,人类认识到了,一种带正子拷贝。

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Scishow 精选系列

And when an electron and a positron or a proton and antiproton meet, they annihilate.

当一个子与相遇,或一个质子与反质子相遇,它们就会抵消。

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超女 第02季 S02

I'm sorry, we have a positron cannon?

抱歉 我们还有炮?

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经济学人-科技

Within the limits of accuracy of the experiment, positron spin-flipping seems to happen at the same frequency as electron spin-flipping.

在实验精度可以达到范围内,自旋反转似乎与自旋反转发生在同一微波频率上。

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宇宙奥秘

When electrons collide with the foil, positrons are formed in the flow.

子与金属箔相撞时,在流动中形成。

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超女 第02季 S02

The positron cannon is ready to fire.

炮准备好了。

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Scishow 精选系列

The positron then immediately finds an electron, the two annihilate making a tiny flash of light, a photon.

马上找到一个子,这两个湮灭时产生光子微小闪光。

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宇宙奥秘

Next, a magnet comes into play and spreads positrons and electrons in different directions.

接下来,一个磁铁开始发挥作用,把子分散到不同方向。

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Scishow 精选系列

In the case of the electron and the positron, for example, they form two photons, massless virtual particles that convey the electromagnetic force.

在这种情况下,比如子和相遇,它们会形成两个光子,光子是静止质量为零粒子,是磁辐射载体。

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