磁场

• Total field measurement is not always desirable .
  总磁场测量不是始终需要的。
• A fluctuating magnetic field is produced in the iron .
  铁心中就产生交变磁场。
• In small fields the changes are reversible .
  在很弱的磁场中，这种改变是可逆的。
• The string is in a magnetic field .
  振动弦处于磁场之中。
• The strength of the magnetic fields are likewise fixed .
  磁场的大小也同样是固定的。
• We might put the current-carrying wire in a magnetic field .
  我们可将载流导线置于磁场中。
• A third radiation group was unaffected by the magnetic field .
  第三组射线不受磁场的影响。
• The iron flings align themselves in the direction of the magnetic field
  铁屑按磁场的方向排列。
• If a magnetic field is switched on, the symmetry is broken .
  如果加上磁场，就破坏了这种对称性。
• The magnetic field of an atom is usually dominated by the electrons .
  原子的磁场通常由电子决定。