自感系数是电磁感应现象中的重要概念，关于它的定义可归纳为静态定义、动态定义和能量定义。
Self-induction coefficient is an important conception in the electromagnetic induction. There are three definitions for it : static definition, dynamic definition and energy definition.
结果表明，此现象产生于螺线管交变磁场中的自感应作用，对于碰聚焦点不产生影响。
It is shown that the phenomenon is due to self-induced action in alternative magnetic field of electric solenoid and is of no effect to the point of magnetic focusing.
结果表明，此现象产生于螺线管交变磁场中的自感应作用，对于碰聚焦点不产生影响。
It is shown that the phenomenon is due to self-induced action in alternative magnetic field of electric solenoid and is of no effect to the point...
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