Groundwater is the significant source of arid and semi-arid area, sometimes it's the single source of water.
地下水是干旱、半干旱地区用水的重要来源，有时甚至是唯一的水源。
Propylaea japonica is one of important predatory natural enemies in arid and semi-arid area China, especially those preying on younger larvae and eggs of insect pest in orchards and cotton fields.
龟纹瓢虫propylaeajaponica是我国干旱、半干旱地区农林果蔬生产中重要的捕食性天敌之一，尤其在夏季高温、干旱的情况下，对果园、棉田的幼龄害虫和卵的捕食作用非常明显。
Some stress resistant physiological indexes of the leaves of three Ligustrum species were compared to provide theoretical basis for cultivation management in arid and semi-arid area in north China.
为给女贞、金叶女贞和金边女贞在北方干旱、半干旱地区的栽培与管理提供理论依据，对这三种女贞的部分抗性生理指标进行了比较试验。
Solid water affords a new approach to drought resistant planting in arid and semi arid area.
固体水为干旱、半干旱地区的抗旱造林提供了一种新的途径。
Northwest of China, whose area accounts for 38 percent of the total, is one of the typical arid and semi-arid zone in the world.
我国西北地区是世界上典型的干旱半干旱地区之一，占国土面积的38%。
In the arid and semi arid area, the precipitation is little, soil moisture insufficient and low survival rate, low preserved rate and slow growing of trees.
干旱半干旱区降水少，土壤水分亏缺，林木成活率低、保存率低、生长缓慢。
The area of arid and semi-arid region of China accounts for 52.5 percent of the the whole area of territory, it is important bases of agriculture, forestry, animal husbandry of our country.
中国干旱半干旱地区面积约占国土总面积的52.5%，成为农业、林业、畜牧业的重要基地。
The western area of 1oss plateau of China, including the area of GansuProvince, Ninxia Hui Autonomous region and Haidon district of QinghaiProvince, lies in the arid and semi-arid climatic zone.
我国黄土高原西部地区，包括甘肃、宁夏和青海的海东地区，位于干旱和半干旱的气候类型地带。
China's arid and semi-arid land area accounting for about 1/2, while, with the enhancement of Greenhouse effect, the of drought-resistant varieties breeding will be an important aspect in the future.
我国干旱和半干旱地区面积约占全国土地面积的1/2，同时，随着全球温室效应的增强，对抗旱品种的选育将是未来品种的选育的一个重要方面。
China's arid and semi-arid land area accounting for about 1/2, while, with the enhancement of Greenhouse effect, the of drought-resistant varieties breeding will be an important aspect in the future.
我国干旱和半干旱地区面积约占全国土地面积的1/2，同时，随着全球温室效应的增强，对抗旱品种的选育将是未来品种的选育的一个重要方面。
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