The plasma flows in a loop along a magnetic field line.

这些等离子体沿着磁力线的方向流动喷发。

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In the presence of a strong magnetic field, the red blood cells form chains that align themselves with the field lines where convoys of red blood cells line up behind a leading cell.

在强磁场的影响下，红细胞会顺着磁场线的方向排列成细胞链，其中会有若干红细胞在领头细胞之后排列成一队。

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The field is generated in the Earth’s core as it spins, creating a dynamo," and the magnetic poles don’t line up with the Earth’s physical poles.

磁场产生于地球快速旋转的中心，并产生发电。” 而且磁极与地球的物理两级并不在一条直线上。

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And he found line splitting in the magnetic field.

他发现光谱线在磁场中分裂了。

麻省理工公开课 - 固态化学导论课程节选

And when a magnetic field line vibrates, he says, it makes an electric field which excites current in wires.

FORBES: Sun-Grazing Comets As Triggers For Electromagnetic Armageddon

The system detects any change in the magnetic field on or behind the goal line to determine if a goal has been scored and alerts the ref.

CNN: Over the line: Goal tech to be used at 2014 World Cup

GoalRef, meanwhile, uses a magnetic field and a special ball to determine whether a ball has completely crossed the line or not.

CNN: Goal-line technology enters final testing