...射线主要部的高能质子这些质子来自将宇宙射线中的电子加速到高能状态的同一“超新星泵”，这些高能质子通过碰撞产生介子（Pion），后者在前往地球的途中衰变成能量非常高的伽马射线。
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pion beam 介子束
pion condensation 介子凝聚 ; 介子凝结
one pion exchange force 单介子交换力
pion dosimetry 介子剂量测定法
soft pion limit 软 ; 介子极限
Mount Pion 皮昂山
beam pion 派介子射柱
Louis Pion 平面广告欣赏 ; 路易飘
N a meson having a positive or negative charge and a rest mass 273.13 times that of the electron, or no charge and a rest mass 264.14 times that of the electron 介子 [physics]
It's not easy to kill a full-grown tree - especially one like the pion pine.
要弄死一棵成年的树，尤其是像矮松这样的树并不容易。
Methods The clinical dats of 38 cases (42eyes)with anterior ischemic optic neuropthy (AION) and 3 cases (5 eyes) posterior ischemic optic neuropthy (PION) were retrospectively analyzed.
方法回顾分析了38例4 2 眼前部缺血性视神经病变（AION）及3例5 眼后部缺血性视神经病变（PION）的临床资料。
Dr Learned and Dr Zee have come up with a design for a particle accelerator that would do the job a good deal more modestly, using another type of subatomic particle, the pion, as an intermediary.
莱德和哲博士设计出一种粒子加速器，利用另一种亚原子粒子n介子作为中介，从而实现更优的方案。
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