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
We just don't see each other anymore.
我们彼此差不多见不到面了。
Who is the auther of this play?
谁是这戏剧的作者？
Excuse me, are you American?
你是美国人吗？