concentrations

英 [ˌkɒnsənˈtreɪʃənz]

美 [ˌkɑnsənˈtreɪʃənz]

n.  专心; 专注; 关注; 重视; 集中; 聚集
concentration的复数

柯林斯词典

• N-UNCOUNT 全神贯注;专心;专注
  Concentrationon something involves giving all your attention to it.
  1. Neal kept interrupting, breaking my concentration...
     尼尔不停地打断我，使得我无法集中注意力。
  2. We lacked concentration and it cost us the goal and the game.
     我们注意力不够集中，结果丢了球，输了比赛。
• N-VAR 集中;汇集
  Aconcentration ofsomething is a large amount of it or large numbers of it in a small area.
  1. The area has one of the world's greatest concentrations of wildlife...
     这个地区是世界上野生动物最为密集的区域之一。
  2. There's been too much concentration of power in the hands of central authorities.
     权力一直过多地集中在中央机构手中。
• N-VAR 浓度
  Theconcentration ofa substance is the proportion of essential ingredients or substances in it.
  1. pH is a measure of the concentration of free hydrogen atoms in a solution...
     pH值是测试溶液中自由氢原子浓度的单位。
  2. The latest data showed that global ozone concentrations had dropped several per cent over the last decade.
     最新数据显示，过去10年来全球臭氧的浓度降低了几个百分点。

双语例句

• The influence of the compositions and concentrations of rare earth dopant on refractive index was discussed.
  测量了玻璃样品不同波长光源照射时的折射率，讨论了稀土掺杂成分和浓度对折射率的影响。
• Unlike carbon monoxide, gaseous hydrocarbons at concentrations normally found in the atmosphere are not toxic;
  和一氧化碳不一样的是，在空气中常被发现的气体状的浓缩碳氢化合物是无毒的；
• After equilibrium is attained, drug concentrations in tissues and in extracellular fluids are reflected by the plasma concentration.
  达到分布平衡后，便可通过血浆浓度反映组织和细胞外液的药物浓度。
• Expression of hydrogenion concentrations in terms of molar concentrations is rather cumbersome.
  用摩尔浓度表示氢离子浓度是相当麻烦的。
• Selenium and aluminum are found in vanishingly small concentrations within living things.
  硒和铝在生物中含量其微。
• The results showed that different concentrations of cadmium ions affect differently the growth and activity of the bacteria.
  研究表明：不同浓度的镉离子对细菌的生长和活性起不同的作用。
• The latest data showed that global ozone concentrations had dropped several per cent over the last decade.
  最新数据显示，过去10年来全球臭氧的浓度降低了几个百分点。
• The changes in concentrations of organic matter were monitored in the high-intensity aquaculture ponds.
  摘要对对虾高密度养殖水体中有机物含量的变化进行了监测和分析。
• Record concentrations and time in order to extract rate coefficients.
  记录浓度和时间，以提取速率系数。
• Because at least for that pair of constituents, I know the dependents for some range of concentrations.
  因为至少，对那两个组分，我知道，它对某个浓度范围的依赖关系。