[mass noun]the action or power of focusing one's attention or mental effort
专心,专注;注意力
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frowning in concentration 蹙额深思
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the worker needs total concentration. 这个工人需要全神贯注。
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(仅)处理;(仅)注重
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concentration on the needs of the young can mean that the elderly are forgotten. 对年轻人需求的注重可能意味着对老年人的忽视。
a close gathering of people or things
聚集者;集中物;集结物
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the island has the greatest concentration of seabirds in the north-west. 此岛集中了西北部最多的海鸟。
[mass noun]the action of gathering together closely
集中;集结
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the concentration of power in the hands of nobles. 贵族手里集中的权力。
the relative amount of a particular substance contained within a solution or mixture or in a particular volume of space; the amount of solute per unit volume of solution
浓度;含量
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the gas can collect in dangerous concentrations. 此种气体能聚积到引起危险的浓度。
[mass noun]the action of strengthening a solution by the removal of water or other diluting agent or by the selective accumulation of atoms or molecules
浓缩。
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