This is a specially designed magnet that allows an operator to steer the capsule around using external magnetic fields generated in a belt worn by the patient when he is being examined.
它是由一个特制的磁体制成，患者接受检查时会佩戴一条带子以产生一个外部磁场，这样医生就可以通过这个外部磁场来控制胶囊的方位。
The pair performed external experiments on the Salyut station and remained outside their Soyuz capsule for more than three-and-a-half hours.
这对宇航员在礼炮号空间站进行外太空实验，并在联盟号密封舱外面停留超过三个半小时。
A handheld external magnet was used to manipulate this capsule in the esophagus and stomach.
一枚体外磁铁用来操纵胃内及食管内的胶囊内镜。
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