绿洲农田沙害时空变化特征。
Characteristics of oasis farmland wind-sand disaster variation with time and space.
光照强度在杏树行间的分布具有时空变化特征。
The light intensity had characteristics of temporal and spatial variation.
近30余年来南极和邻近地区温度的时空变化特征。
The space-time characteristics of the temperature change in Antarctic and its vicinity in the last 30 years .
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