Pionium
n. [核]π介子素(由一個π介子和一個μ子組成的短命的準原子)
??? 情景例句
Well, that's easy.
哦， 那很簡單。
Without health, life is not life, life is lifeless.
如無健康的身體，生活就不成為生活，人生也毫無生氣。
An ancient bus stopped by a dry river bed and a party of famous actors and actresses got off.
一輛古舊的汽車停在一條干涸的河床邊，一群著名男女演員下了車。