For Brazil, a country with a seemingly endless supply of footballers with magnetic feet, winning the World Cup is often fairly straightforward. Hosting it may prove harder.
巴西似乎从来都不缺少脚法极具魅力的球员，对于这个国家来说，夺取世界杯常常易如反掌，而主办世界杯就可能勉为其难了。
However if a permanent magnet is put near the bottom of cup it will produce a heterogeneous magnetic field and act on the aluminum ball to produce a magnetic buoyant force.
但当下方永久磁铁靠近杯底时，在磁液中产生非均匀磁场，对铝球作用一磁性浮力。
This thesis mainly introduces the developing course of the vacuum killing arc room possessing the cup form horizontal magnetic field in detail.
本论文主要对杯状横向磁场触头结构真空灭弧室的研制过程进行了详细的阐述。
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