• 1. primary source: 一次文献 | 一次光源 | 主电源 | 直接资料
• 2. primary source material: 原始生油物质 | 资料
• 3. Primary Source Subdivision Accuracy: 令主要光源划分精确度

更多释义

• 1.There are many who argue that corn ethanol should replace fossil fuel gas as the primary source for running cars.
  许多人认为，玉米乙醇应该取代化石燃料气体，成为汽车的主要燃料。
  dict.yoduao.com
• 2.Parallel rails had long been used in mining operations to move bigger loads, but horses were still the primary source of power.
  在采矿作业中，平行铁轨早已被用来运送大件的货物，但马匹仍然是主要的运输工具。
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• 3.Wood, the primary source of heat for homes and industries and also used in the iron industry as processed charcoal, was diminishing in supply.
  木材是家庭和工业的主要热源，也以加工木炭的形式用于铁工业，它的正在减少。
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