正电子

So we build, starting around 1970, a special machine in which we collided electrons positrons.

因此，我们建造， 1970年前后开始，一个特殊机器，我们的电子正电子相撞。

Normally, it is impossible to distinguish Cherenkov radiation generated by positrons from that created by electrons.

一般来说，由电子引发的切伦科夫辐射和由正电子引发的切伦科夫辐射是不可能区分开的。

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。

Electrons and protons are forms of ordinary matter, but positrons are antimatter particles.

电子和质子构成了普通物质，但正电子是反物质粒子。

In the case of a material with a defect, the positrons are trapped at nano-sized defects in the material.

如果材料有缺陷，这些正电子可以捕捉到纳米尺寸的材料缺陷。

This is because radioactive nuclear elements are formed in the giant outbursts of energy, and some of these decay by releasing positrons.

这是因为放射性核素在这巨大的爆炸能量中形成，其中一些放射出正电子而衰变。

Calculations suggest that when WIMPs and antiWIMPs meet, one product will indeed be a lot of positrons.

计算表明当 WIMPS 的正反方相遇时所产生物质中确实有许多的正电子。

The drug discharges positrons from wherever they are used in the body.

正电子药物排出来自何处，都用身体。

Meanwhile, positrons from the decay of a form of radioactive sodium are separately slowed and accumulated.

同时，来自放射性钠一种形式的衰减正电子被慢慢分开且累积起来。

Calculations suggest that when WIMPs and antiWIMPs meet, one product will indeed be a lot of positrons.

计算也表明，当WIMP的正物质形式和反物质形式相遇时，一个很可能的结果就是产生大量的正电子。

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％。