This has led to further deterioration of the supply-demand ratio for modern passenger transport.
这导致现代客运交通供求比例的进一步下降。
The ultimate price of the world's goods is the ratio of supply to demand.
世界上所有商品的最终价格是指供需的比例。
Also we can forecast the air spares demand by the order model, and use the air supply ratio land the capital ratio to evaluate the service quality of air supply system.
本文的特点在于利用数学方法来预测航材的需求,运用航材保障率和资金周转率来评价航材保障系统的服务质量。
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