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concentrations
Concentration on something involves giving all your attention to it.
Neal kept interrupting, breaking my concentration.
尼尔不断打扰，使得我不能集中注意力。
A concentration of something is a large amount of it or large numbers of it in a small area.
The area has one of the world's greatest concentrations of wildlife.
该地区有世界上野生生物最集中的区域之一。
There's been too much concentration of power in the hands of central authorities.
过去中央政府手中的权力过于集中。
The concentration of a substance is the proportion of essential ingredients or substances in it.
pH is a measure of the concentration of free hydrogen atoms in a solution.
pH值是溶液中游离氢原子浓度的计量单位。
Global ozone concentrations had dropped over the last decade.
在过去十年中全球范围的臭氧浓度下降了。
雅思英语词汇收录8785个雅思英语词条，基本涵盖了全部常用雅思英语词汇的翻译及释义，是英语学习的有利工具。