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
Really? I'm not much of an outdoor person.
真的？我不是很喜欢户外活动的人。
Open your book,please.
请把书打开。
Suddenly, one of the children kicked a ball very hard and it went towards a passing boat.
突然，一个孩子狠狠地踢了一脚球，球便向着一只划过来的小船飞去。