annual difference是什么意思

用法例句

Data of temperature and humidity from 1995-2005 in storage sites,which are Changchun,Wuxi,Guangzhou,Xisha,Lasa,were analyzed for changing trend,annual difference,yearly extremely high and low temperature and humidity.

从温湿度的变化趋势、年较差、极端最高值、极端最低值等方面分析研究了储存试验站(长春、无锡、广州、西沙和拉萨)从1995-2005年的监测数据。