Because the core current is somewhat symmetrical around the axis of rotation , the associated magnetic field is similar to that of a bar magnet 因为地核流在旋转轴周围存在着一些对称，所以相关的磁场与棒磁铁的磁场相似。
In the first half of his career at ornl , lue worked in various stages of research and development of superconducting magnets for fusion reactors 在橡树岭国家研究院的前半段时间里，吕锦文从事核融合反应炉所需的超导磁铁的研发。
Lues research on the stability and quench issues of superconductors and superconducting magnets spanned both the low and high temperature superconductors 吕锦文在超导体及超导磁铁的稳定和骤停问题的研究，从低温超导体延伸到高温超导体。
Alpha - magnet , the beam energy choosing and pulse width compressing element , is a key part of the injector . it plays an important role in 30mev linac system -磁铁的功能是束流电子能量选择和脉冲宽度压缩，在30mevlinac系统中起着非常重要的作用。
At 100 , 000 times the strength of the earth ' s magnetic field , the university ' s magnet is so strong it pulls on the steel shanks in the shoes of people who come near it 利诺大学那块磁铁的磁场强度是地球的十万倍，强到人们走近它时，鞋子里的铁心都会被吸引。
An example is superconducting magnets that can produce magnetic fields in excess of 20 tesla ( about 500 times stronger than a typical refrigerator magnet ) 可以产生强度超过20特士拉的磁场的超导磁铁，就是一个例子（磁力约为一般贴在冰箱门上小磁铁的500倍） 。
Further down , the company said it was also recalling some other toys because they contained a type of powerful magnet that could be dangerous if swallowed by a child 随后不久，美泰表示，还将召回一些含有一种强力磁铁的其它玩具，若儿童不慎吞食这种磁铁，可能会相当危险。
Miss jones had been giving her second - grade students a lesson on science . she had explained about magnets and showed how they would pick up nails and other bits of iron 琼斯小姐给二年级的学生上了一堂物理课。她向同学们讲解了磁铁的性能，并演示了磁铁是怎样拾起铁钉和其他铁片的。
Brought into contact with tragedy , the elements of our being fall , for the moment at any rate , into an ordered and beautiful pattern , as the iron filings arrange themselves under the influence of the magnet 一旦与悲剧相接触，我们生命中的种种因素，至少在这短短时刻，便纳入一种井然有序、异常美好的规范之中，恰如铁屑在磁铁的吸力下聚拢起来一样。
Sometimes the magnet system may satisfy the special request or as the magnet substitution which some single magnets cannot achieve achieved the magnet can achieve the effect , at the same time also saves the cost compared to the independent employment magnet 有时候磁铁系统可以满足一些单个磁铁所不能达到的特殊要求或作为磁铁的取代品达到磁铁所能达到的效果，同时比单独使用磁铁还节约成本。
