如果在两个接地点存在一个小的电势差，在系统的敏感部分就会有接地电流通过。
If a small potential difference exists between two ground points, some ground currents may flow through a sensitive part of the system.
如果在两个接地点存在一个小的电势差，在系统的敏感部分就会有接地电流通过。
If a small potential difference exists between two ground points, some ground currents may flow through a sensitive part of the system.
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