If a magnetic field is applied, the BFEC-oil mixture would move in magneticdirection.
在磁场作用下，该混合体向磁场方向运动。
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As the field wanes, the number of sunspots falls to a trough or minimum, at which point the sun's magnetic field reverses direction and starts to regain its strength.
Moreover, turtles responded to the magnetic fields by orienting themselves in a direction that would have led them towards the capture site had they been where each magnetic field naturally occurs.