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
Charley was the star of the team.
Charley，是当时队里的明星。
The flood has left many people homeless.
许多人因洪水而失去了家园。
We can also use satellites to help us make telephone calls to foreign countries.
我们也能利用卫星帮助我们打国际电话。