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

• 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。
• 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。
• Oxygen concentrations in excess of 23% increase the hazard exposure to personnel and material.
  氧浓度超过23%增加了暴露于其中的人员和材料的危险。
• Heavy metal concentrations in plants and soils were studied in the area with serpentine soil in Yunnan in China.
  对云南蛇纹岩发育土壤进行了植物和土壤的重金属含量调查和分析。
• We can calculate the different concentrations of wine and water.
  我们可以计算出葡萄酒和水的不同浓度。
• They also reduce serum cholesterol concentrations in rats, chicks, and humans.
  它们也降低老鼠、小鸡和人体中的血清胆固醇浓度。
• 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；
• Selenium and aluminum are found in vanishingly small concentrations within living things.
  硒和铝在生物中含量其微。
• They concluded that folic acid lowers the concentrations homocysteine in the blood.
  他们的结论是：叶酸可降低血液中同型半胱氨酸的浓度。