Fima
费马(已裂变原子数与初始的总装料金属原子数之比)
🗣️ 情景例句
But it won't be on my birthday!
但那就不是在我生日那天了！
Cool it man，I'm sorry.
对不起，请您息怒。
He always meant to go back on day, but not to stay.
他总想将来回国看看，但却不愿长期住下去，