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
Are you injured, sir?
先生，您受伤了吗？
Once an opportunity slips away, it is gone for good.
机会一旦错过，永远不会再来。
He speaks little Chinese, so it's difficult to communicate with him.
他只能讲一点汉语，所以和他交流很难。