It covers the whole forestry field, including the protection and management of forests, related rangelands, and water-sheds; utilization of forest products; and the economic aspects of forestry.
它涵盖了整个林业领域，包括森林、相关牧场和集水区的保护和管理，森林产品的利用以及林业的经济方面。
Multiple cropping vegetable and rice can improve soil utilization rate reduce plant diseases and insect pests and prevent soil stalinization in protective field.
稻菜复种可以提高土地利用率、少蔬菜的病虫害、止保护地内土壤的盐渍化。
If this field is left blank, the shipment sizes to customers (and therefore costs) will be based on the carrier definition and utilization.
如果这个字段为空，则其发货装运大小批量或者成本都将由承运商的相关定义和利用率来决定。
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