如果病毒继续传播，除了流感病毒内在变异性之外，其它因素也可能会以完全无法预测的方式影响目前疾病模式的严重程度。
Apart from the intrinsic mutability of influenza viruses, other factors could alter the severity of current disease patterns, though in completely unknowable ways, if the virus continues to spread.
世界宏观经济走势受许多不确定因素的制约，谁也无法预测它的走向。
The world's macroeconomic trend is influenced by many uncertain factors, so no one can predict its future direction.
航段运量受到区域经济、地理、旅游和季节等多种因素的影响，单一预测模型无法适用于所有航段。
The flight segment volume is influenced by many kinds of factors, such as the region economy, geography, tourism and the season and so on.
航段运量受到区域经济、地理、旅游和季节等多种因素的影响，单一预测模型无法适用于所有航段。
The flight segment volume is influenced by many kinds of factors, such as the region economy, geography, tourism and the season and so on.
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