8.When drill hole in sandy soil the desander should be timely turned on to reduce the sand content and ensure the drilling progressing and stability of the hole.
在砂层中钻进时,要及时开启泥浆分离器,降低含砂率,保证钻进速度和孔壁的稳定。
9.Calcifuge Describing plants that grow on soils containing very little calcium carbonate, such as sandy or peaty soils and cannot grow on basic substrates such as most chalk and limestone soils.
在碳酸钙含量低的壤中生存的植物,例如在沙地或泥地中生长。这种植物在石灰石之类的碱性基质中不能生长。
10.Abstract : In dry area or sandy dryland, for the reason of scarce rainfall, windiness and lack of labor power and material resources, the low survivor ratio of afforestation were common.
要 : 在干旱或荒漠地区造林,降雨稀少,风多且风大,加之人力、物力的贫乏等原因,导致造林成活率低。
11.In summer Shantou is swimming Holy Land, on the sandy beach of golden colour can have always the visitor that does not settle frequently in seaside swim frolicly water, I like my hometown, Shantou!