外回路采用内模控制，以有效地补偿对象的大滞后特性。
The inside loop is used to overcome fuel disturbance quickly, and the outside loop is used to compensate time-delay of object.
它的关键技术是检测出补偿对象电流中的谐波和无功等电流分量。
Its key technology is the current compensation object detected in the other harmonics and reactive current component.
在另一个方面，建立一个 PreparedStatement 对象会带来一定量的系统开销。 所以，在理想情况下，这条语句的生命周期应该足够长，以补偿它所带来的系统开销。
On the other hand, creating a PreparedStatement object introduces a certain amount of overhead, so, ideally, the statement's lifetime will be sufficiently long to compensate for this overhead.
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