从对基底冻土上限影响的角度来看，路面类型、外部气温与路基高度三者间存在一定的动态等效关系。
Considering the effect on permafrost table, there is a kind of dynamic equivalence to some degree among pavement types, external temperature and embankment heights.
通过对通风、降雨、气温、挖掘等的分析，论述了煤层自燃的外部影响条件。
And he also explained the exterior influence factors of the coal seams spontaneous combustion by analyzing the ventilation, the rain fall, the air temperature and the digging.
影响秋色叶变化的内部因素主要是光合产物的变化，外部因素为光照、气温、水分等。
The intrinsic factor influencing the autumn-color leaf is the change of photosynthetic production, and the extrinsic factors are illumination, temperature and moisture.
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