求翻译：所以，港口竞争力评价指标体系的选择既要包括定量评价要素，也要包括定性评价要素，遵循定量指标与定性指标相结合的原则。是什么意思？

Therefore, the choice of port competitiveness evaluation index system should not only include quantitative evaluation elements, but also includes qualitative evaluation elements, to follow the quantitative indicators and qualitative indicators to the principle of combining.

Therefore, the port's Competitiveness Index evaluation of select elements to include quantitative evaluation, but also to include qualitative evaluation elements follow quantitative indicators, with a combination of qualitative indicators.

Therefore, the harbor competitive power appraisal target system choice already must include the quantitative evaluation essential factor, also must include the qualitative appraisal essential factor, the principle which the deference quota target and the stationary index unify.

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