uranium rod的用法和樣例：
例句
- This comes about because a chain reaction starts in the uranium bars.
這種事情的發(fā)生是因為鏈式反應是在鈾棒中開(kāi)始的。 - By varying the relationship of the uranium rods and the carbon, the chain reaction can be speeded up or slowed down.
通過(guò)改變鈾棒和碳之間的位置關(guān)系，能使鏈式反應加速或減速。
