2) difficult mountain area
困难山区
3) Difficult site
困难立地
1.
Researches indicated that solid water can enhance the survival rate of trees,especially in difficult site,satisfactory effects of afforestation could be obtained.
以往研究表明,固体水能够提高造林成活率,特别在困难立地造林应用中已取得较好效果。
2.
In order to enhance survival rate of trees planted in difficult sites and reduce sandstorm harm to Beijing,solid water application experiment was carried out for afforestation in the desolate alluvial flat of Longqingxia in Yanqing County of Beijing.
为提高困难立地的造林成活率,减轻风沙危害,在位于北京市北部的延庆县龙庆峡荒滩布置固体水造林的应用试验。
4) unfavorable geological condition
困难地质
5) Difficultly planted zone
困难地带
6) difficult and fault
困难和误区
补充资料：太平洋地区标准会议标准(见太平洋地区标准会议)
太平洋地区标准会议标准(见太平洋地区标准会议)
standards of PASC: see Pacific Area Standards Congress; PASC
Ta iPingyang Diqu Bioozhun Hu呼ib沁幻Zhun太平洋地区标准会议标准(s切md田心sofR巧C)见太平洋地区标准会议。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条