中国古代史官制度有其鲜明的特点：史官机构从一开始的零星散乱到后来的完善严谨；
The Chinese ancient history officer's system has its fresh and clear characteristics, the history officer's organization spreads confusion to arrive piecemeal from the first later perfect and careful;
原因是在他们6年的研究期间，接触到的港口记录零星散乱，仅三分之一的非法船只有迹可循。
The ports' records were in woeful shape, tracking the movement of only one-third of those boats during the six-year research period.
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