核算项目成本，并比较实际成本与项目目标成本的差异。
Cost calculation for each project, compare the actual cost with project target cost.
以产品低成本为基础的比较优势与以产品差异化为基础的竞争优势是统一、互补的。
The comparative superiority based on the low cost of products is of compatible and mutual supplement with the competitive superiority based on differentiation of products.
与传统营林措施比较，杉木幼树的生长无显著差异，营林成本可以降低5 2 5 %。
The silvicultural cost might be lowered by 52.2%, as compared with that of traditional silvicultural measures.
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