pian
US /piˈɑːn/
UK /piˈɒn/
名词
π介子
a subatomic particle, specifically a meson, that is involved in strong nuclear interactions
示例:
•
Physicists study the properties of pions in particle accelerators.
物理学家在粒子加速器中研究π介子的性质。
•
The decay of a pion can produce muons and neutrinos.
π介子的衰变可以产生μ子和中微子。