Magnatotactic bacteria are capable of forming magnetosomes , which enable the bacteria to orient and migrate along the geomagnetic field lines 摘要趋磁细菌菌体内含有磁小体，能够沿地球磁力线方向定位、运动，趋磁细菌和磁小体的研究具有重要的理论意义和应用价值。
Under these circumstances , reconnection takes place along a wide equatorial belt , opening up nearly the entire outer boundary of the magnetosphere to the solar wind 在这种情况下，磁力线重连会在赤道面上宽广的带状区域内发生，几乎把整个磁层外围边界都打开，放太阳风进来。
Non - destructive testing of steel tubes - automatic full peripheral magnetic transducer flux leakage testing of seamless ferromagnetic steel tubes for the detection of transverse imperfections 钢管的无损检验.横向缺陷探测用无缝铁磁性钢管的自动全周界磁力换能器磁力线渗漏检验
Reconnection is most efficient when the imf has a component that is directed southward ? that is , opposite to the northward direction of the earth ' s magnetic field at the dayside of the magnetosphere 在磁层昼侧，若imf有南向分量，也就是和北向的地球磁场方向相反，则磁力线重连的效率最高。
Following what exactly happens during a reconnection event requires , first off , a general understanding of how invisible magnetic loops can trap hot gas in the solar atmosphere 想了解磁力线重连事件中究竟发生了些什麽事情，必须先对看不见的磁力环圈如何捕捉太阳大气里的热气有一些基本认识。
As the wind carries this interplanetary magnetic field ( imf ) away from the sun , the field lines typically stretch out so that they are directed radially ( pointing toward or away from the sun ) 这种行星际磁场（ imf ）的磁力线基本上都是往外拉的，也就是径向的（即不是指向，就是背向太阳的方向） 。
For other orientations of the imf , reconnection still happens , but it may be more localized in the higher latitudes , where the released energy mainly flows around the magnetosphere rather than into it 假如imf指向别的方向，磁力线重连仍能发生，但会比较局限在高纬度，释放出的能量则主要流经磁层外围，而非流入磁层内部。
Far below the southern tip of africa they found a small region where the magnetic field lines point peculiarly toward the center of the earth instead of toward the surface , as do the dominant lines in that region 他们发现，在非洲南端的地表深处，有一小块区域，那儿的磁场磁力线罕见地指向地心，而不是如该区域的主磁场磁力线一般地指向地表。
The results of orientation response in the resonant cavity show that it is best to measure alanine film dosimeter in horizontal orientation paralleling to the magnetic field , which can obtain the highest amplitude and the smallest uncertainty 通过剂量计在共振腔内的方向效应实验，发现平行于磁力线方向测量最佳，可得到最大的信号强度和最小的测量不确定度。
Send a specified electrical signal to the underground cable , when the probe is vertical cutting to the magnetic horizon , the signal is smallest ( almost to zero ) . we can find the locationand depth of the cable according to this principle 通过向地下管道发送出特定的电磁波信号，探测仪利用探头与磁力线地平面垂直相切时，收到的信号最小（几乎为零）的原理来测定埋地电缆的走向和深度。
