concentration

名词 concentration:

1. (chemistry) the strength of a solution; number of molecules of a substance in a given volume (expressed as moles/cubic meter)
2. the spatial property of being crowded together
   同义词：density, denseness, tightness, compactness
3. strengthening the amount of a substance in a unit amount of another substance (as of a solute in a mixture) by removing the other substance
4. increase in density
5. complete attention; intense mental effort
   同义词：engrossment, absorption, immersion
6. bringing together military forces
7. great and constant diligence and attention
   同义词：assiduity, assiduousness

1. The tennis players need total concentration during play.
   网球运动员在比赛中需要全神贯注。
2. The drug affects one's power(s) of concentration.
   这种药影响人精神不能集中。
3. The inward flow of a fluid through a permeable membrane toward a fluid of greater concentration.
   内渗透一种液体透过可渗透膜流向另一种浓度比它高的液体的内部流动
4. A state of mental concentration.
   专心致志，全神贯注全神贯注的状态
5. I found it hard to keep my concentration with such a noise going on.
   吵闹声不绝于耳，我很难保持精神集中。
6. Stress and tiredness often result in a lack of concentration.
   紧张和疲劳常使人精神不集中。

con.cen.tra.tion

n.（名词）

The act or process of concentrating, especially the fixing of close, undivided attention.
专心：全神贯注的动作或过程，尤指专注的、不分散的注意力的集中
The condition of being concentrated.
全神贯注的状态
Something that has been concentrated.
经过浓缩的物品
Chemistry The amount of a specified substance in a unit amount of another substance.
【化学】 浓度：在某一单位物质中另一特定物质的含量