光合作用和于物质的生产与分配模型是作物生长模拟模型中最基础的部分，在试验的基础上以徐薯18为例建立模型。

Photosynthesis and dry-matter partioning are main procedures in crop growth and development models. In this paper, a model is presented based on experiment of sweet potato variety Xushu 18.

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正如大家所知道的，经济学是与生产、分配、交换和消费物品和服务相关的社会科学。

Economics, as we know it, is the social science concerned with the production, distribution, exchange, and consumption of goods and services.

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该情况与试图决定如何分配每年的预算，并决定用于市场而生产的最佳的产品组合的公司没太大差别。

The situation is not much different from a corporation trying to decide how to allocate the yearly budget and determine the best product mix to produce for the market.

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Economics deals with the transactions involving the production and distribution of wealth sociology with the transaction governing status and class anthropology with the domain of culture and so on.

经济学处理,包含财富生产与分配的交易,社会学处理,管治地位与阶级的问题,人类学专注于文化，依此类推。

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