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。
2
The releasing rules of carbon dioxide under the condition of contact metamorphosis were systematically studied, and the releasing amount of carbon dioxide was calculated by modeling.
系统地研究了接触变质作用条件下二氧化碳释放规律，模拟计算了二氧化碳气的释放量。
3
However, this comes at the expense of releasing all your personal information to parents should they (or their child) ever want to contact you.