求翻译：总体评价值的每次下降，总是以路基工程特点评价值的剧降为前提，这主要是由路基工程特点评价值较冻土内在因素变化剧烈得多所导致的。是什么意思？

The overall assessment of the value of each drop, always roadbed engineering characteristics of the evaluation value of the sharp drop in the premise, which is mainly caused by the intense evaluation than the roadbed engineering characteristics of permafrost internal factors change much.

Overall evaluation of each decline in value, it is always preferable to Roadbed construction features sharp decline in the value of the premise, it is mainly characterized by the roadbed is frozen in a much more dramatic changes.

The overall appraisal value each time drops, always reduces to the premise by the roadbed project characteristic appraisal value play, this mainly is compares the frozen earth intrinsic factor change by the roadbed project characteristic appraisal value to be much fiercer causes.

Overall assessment of each decline in value, always subject to the characteristics of subgrade engineering on the sharp drop in the value of, this is mainly by engineering characteristic evaluation of value of frozen soil subgrade caused much internal changes are severe.

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