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

• High concentrations of compounds in chocolate called flavonoids may lower blood pressure, short-term studies have shown.
  巧克力中高含量的名为黄酮类的复合物可以降低血压，短期研究已表明。
• Effects of acute loss of energy availability on serum LH and glucose concentrations were studied.
  研究了急性能量阻断对血清促黄体素和葡萄糖的影响。
• 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 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。
• Dates, cranberries and red grapes have high concentrations of antioxidants, he said.
  枣子、蔓越莓和红葡萄的抗氧化剂含量很高，他说。
• 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。
• Record concentrations and time in order to extract rate coefficients.
  记录浓度和时间，以提取速率系数。
• However, studies of PRP have yielded varying results, likely reflecting differing platelet concentrations.
  然而，PRP的研究产生了不同的结果，可能反应了不同的血小板浓度。
• 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。