单词：uranium rod
uranium rod的用法和样例：
例句
- This comes about because a chain reaction starts in the uranium bars.这种事情的发生是因为链式反应是在铀棒中开始的。
- By varying the relationship of the uranium rods and the carbon, the chain reaction can be speeded up or slowed down.通过改变铀棒和碳之间的位置关系，能使链式反应加速或减速。
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