研究实验室通常耗费数周来调试这个系统，使它在标准功率测试时有良好表现。
The research LABS often spend weeks tuning their systems to perform well on the standard horsepower test.
但由于无尾桨系统要耗费更多的发动机功率，性能表现不好。
But the performance is poor because requires more power from the engine.
由于复功率追踪引入了与线路数目相等的新节点，对潮流跟踪矩阵进行求逆时将耗费大量的时间。
As complex power method introduces large number new nodes, the invert of tracing matrixes will consume a long time.
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