求助高中物理翻译：： 还有：：哪位大侠可以给出比较地道的英语句子：：：
1、在做圆周运动的过程中，洛伦兹力提供向心力；
2,、根据此原理人们制造了回旋加速器。
3、用该式子r=mv/bQ替代上式中的r,整理后得{}}}}} 4、思考题， 推导出； 拜托诸位，哪些大侠可以给出比较地道的英文呢？》
1. during the circling motion, Lorentz force severs as centripetal force.
2. based on this concept, people invented circular accelerator.
3. substitute r with "r=mv/bQ" in the formular gives us: { }
4. Questions:
推导： derive:
2. based on this concept, people invented circular accelerator.
3. substitute r with "r=mv/bQ" in the formular gives us: { }
4. Questions:
推导： derive:
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