Pion
[化] π介子
🗣️ 情景例句
You're Arnold Franklin!
你是Arnold Franklin！
Do you know when he will be back?
你知道他什么时候会回来？
Accurate, don't you think? Fortunately, I wasn't wearing it at the time.
真够准的，是不是？幸亏我当时没戴帽子。