There is obviously annual variation in the summer temperature in NanChang, and the mean summer temperature has decrease tendency.
南昌夏季平均气温存在明显的年际变化特征，夏季平均气温有下降的趋势；
The variation tendency of air temperature in Qinghai is consistent with that across China.
青海气温变化趋势与同期全国气温变化趋势基本一致。
The results show that the variation of the scaling layer surface temperature is one of the major factors that cause the asymptotic tendency of scaling process.
结果表明，对恒壁温情况必须考虑垢层表面温度随时间的变化，这一变化是导致结垢过程渐近特性的重要原因之一；
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