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

• Objective To observe the effect of relative humidity on indoor concentrations of formaldehyde and ammonia.
  目的观察相对湿度对装修后室内空气中甲醛和氨浓度的影响。
• 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。
• In their paper, the researchers also showed that these high ascorbate concentrations could be achieved in people.
  在论文中，研究人员也表示了这种抗坏血酸的高浓度在人体是可以达到的。
• In strong concentrations it can cause nausea and vomiting.
  浓度过高会导致恶心呕吐。
• 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。
• 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。
• In heavy concentrations, ozone is irritating to the eyes, nose and throat.
  高浓度的臭氧会对眼睛、鼻子和咽喉有刺激作用。
• Similarly, risk concentrations that might be acceptable at a single institution in a period of economic expansion could be dangerous if they existed at a large number of institutions simultaneously.
  同样，在经济扩张时期，一个单独的机构可以接受的风险集中，如果在大量的机构中同时存在，就是十分危险的。
• 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。
• 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。