一级生产是生态系统的生产者利用能量将无机营养物合成能被消费者和分解者利用的有机化合物的过程。
第一级生产 primary production
净第一级生产量 net primary production
总第一级生产量 gross primary production
第三室一级主生产计划 order delivery management
采用一些高级生产技术 advanced manufacturing technologies ; AMT
整个过程开始于第一级MPS (Master Production Schedule，主生产计划).这是要用于最终库存的已知需求、预想和产品的综合。
The process starts at the top level with a Master Production Schedule (MPS). This is an amalgam of known demand, forecasts and product to be made for finished stock.
虽然可能想添加一些验证，但模型对象是适合生产应用的第一级Rails对象。
The model object is a first-class Rails object that is suitable for production USES, though you might want to add some validation.
一级能源生产达到13.4亿吨标准煤。
National primary energy production reached 1.34 billion tons of standard coal.
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