在电子感应加速器中，同一个磁场用于两种目的。
In the betatron, a single magnetic field is harnessed for both purposes.
简单说来，就是通入电流的导体能使相离的另一导体感应产生电流，并形成同一磁场。
Loosely stated, this says that an electrical current in one conductor will induce a current in a second, wholly separate, conductor that shares the same magnetic field.
这种感应的电流在同一方向流动的电流。
This induced current flows in the same direction as the circuit current.
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