求翻译：纵观众多学者专家的研究成果，对港口效率评价多是在不同港口之间进行，找出相对有效的港口作为相对非有效港口改进的方向。是什么意思？

Throughout the research of many scholars and experts, the evaluation of port efficiency between the different ports, to identify the direction of improvement of the relatively effective port as a relatively non-effective port.

Many experts and scholars throughout the research results to the port efficiency evaluation in between different ports to identify relatively effective port as a relative non-effective port improvements.

Looks over the multitudinous scholar expert's research results, appraises many to the harbor efficiency is carries on between the different harbor, discovers the relatively effective harbor to take the relative non-effective harbor improvement the direction.

Across a number of scholar experts research, port efficiency is carried out between the different ports, find the relatively efficient port as a relative non-efficient port improvements.

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