primary

• They made spectroscopy a primary tool of chemical analysis .
  他们使光谱学成为化学分析的主要工具。
• The original development used glass wool as the primary element .
  最初设计是用玻璃纤维做主要部分。
• The removal of the chromatic aberration is then of primary importance .
  这时消除色差具有头等重要性。
• The secondary filtration system is identical with the primary one .
  二段过滤系统与一段过滤系统类似。
• Matter is primary .
  物质是第一性的。
• Of these two primary grades all other grades were varieties .
  其它种种级别都是这两种主要级别的异称。
• The primary site of ozone attack on the cell is the plasmalemma .
  臭氧在细胞上侵蚀的初始部位就是质膜。
• Mixing any two of the primary colors produces a secondary color .
  把任何两种原色混合起来就能产生调合色。
• Accumulations of trash and silt should be near the primary element .
  泥砂和废料的淤积要逐渐靠拢基本元件。
• Some animals may consume insignificant amounts of the primary production .
  有些动物可以消耗很微量的初级产物。