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
First, we have to catch some fish.
首先 ，我们得钓几条鱼。
He that fears every bush must never go a-birding.
疑神疑鬼，绝无收获。
I have a lot of problems.
我有很多问题。