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。
Meanwhile, positrons from the decay of a form of radioactive sodium are separately slowed and accumulated.
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。
The positrons, produced by the decay of radioactive sodium, are cooled into a similarly sized cloud of around 1m particles and held in a neighbouring trap.
目的观察肾上腺素、谷氨酸和碳酸氢钠对放射性口腔黏膜反应的治疗作用。
Objective To evaluate the effect of adrenaline, glutamic acid and sodium bicarbonate dissolved in the mouth on radiation mucositis.
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