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
I hope I can repay you for it.
我希望能报答你。
I've got a terrible pain in my back.
我的背很痛。
In 1892 the age of mass arrivals began, during which 15 million new people passed through Ellis Island into the USA over a period of 62 years.
1892年开始了一个国外移民大量涌入的年代，在随后的62年中，有1，500万新来的人通过埃利斯岛进入美国。