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
You really must have your wits about your when dealing with such people.
跟这类人打交道，你必须格外警觉。
This is to be my treat, so I'll pay for everything.
这次轮到我作东，所以一切由我付账。
Well, I've recently started biology.
喏，我最近开始学生物学了。