semiarid zone的例句大全

protective cultivation techniques of valley and proso millet minor cereal crops in dust semiarid zone in west region of liaoning province

辽西风沙半干旱地区谷黍等小杂粮作物保护性耕作技术

drought-resistance and high-yield cultural techniques of maize in windy and dusty semiarid zone

风沙半干旱区玉米抗旱高产栽培技术研究

an analysis of diurnal changes of water potential of lawn grass and weeds in semiarid zone

半干旱地区草坪草和主要杂草水势的日变化特征分析

effect of film mulching on growth and yield of maize in sandy and semiarid zone

风沙半干旱区地膜覆盖对玉米生长发育及产量的影响

Yanan Prefecture falls into an arid and semiarid climatic zone with an annual average rainfall of 500 mm or so.

延安地区属干旱、半干旱性气候，年平均降雨量500mm左右。

This study deals with precipitation fluctuations in the transitional zone between the arid and semiarid regions of northwest China from the 1950s to the 1990s, discusses spatial variation of 250 mm isohyet during the dry years and wet years;

分析了干旱半干旱区过渡带降水的时空变异性，确定了250mm降水量线在丰枯年份的空间摆动幅度。