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BNC: 1564 COCA: 2752

concentration

Word family 
Related topics: Chemistry
con·cen·tra·tion /ˌkɒnsənˈtreɪʃən $ ˌkɑːn-/ ●●● S3 W2 AWL noun  
1  [uncountableU]THINK ABOUT the ability to think about something carefully or for a long time 专心，专注 → concentrate
 She needed all her powers of concentration to stop herself from slipping on the icy road.
她需要集中全部注意力才能不让自己在结冰的路上滑倒。
 Lack of concentration was a real problem.
注意力不集中是个大问题。
 I lost my concentration and fell asleep.
我精神一放松就睡着了。
2  [uncountableU]ATTENTION a process in which you put a lot of attention, energy etc into a particular activity 关注；重视 → concentrate
concentration on (doing) something
 concentration on your health
对你健康的关注
 concentration on providing value and service
专注提供价值和服务
3  [countableC, uncountableU]AMOUNT a large amount of something in a particular place or among particular people 集中，聚集 → concentrate
concentration of
 the concentration of greenhouse gases in the atmosphere
大气中温室气体的积聚
 the concentration of power in the hands of a few
权力集中在一小部分人手里的现象
4  [countableC]HCLIQUID technical the amount of a substance contained in a liquid 〔液体中某物质的〕浓度 → concentrate
high/low concentrations
 Additives are expensive but are used in very low concentrations.
添加剂很昂贵，但都以很低的浓度使用。
concentration of
 allowable concentrations of pesticides in drinking water
饮用水中允许的杀虫剂浓度
n COLLOCATIONS
verbs
something takes concentration (=needs concentration)
Playing a musical instrument takes a lot of concentration.
something requires/demands concentration formal
Writing an exam requires great concentration.
lose (your) concentration
Halfway through the game, he seemed to lose concentration.
break somebody’s concentration (=stop someone concentrating)
The telephone rang and broke my concentration.
disturb somebody’s concentration
She slipped out of the room, trying not to disturb his concentration.
phrases
somebody’s powers of concentration (=someone’s ability to concentrate hard)
Great athletes are known for their powers of concentration.
a lack of concentration
A lack of concentration when you are driving can be fatal.
a lapse in/of concentration (=a short time when you do not concentrate)
That brief lapse of concentration resulted in a goal for the other team.
adjectives
great/deep concentration
My work demands great concentration.
poor concentration
The boy had behavioural problems and suffered from poor concentration.
total concentration
I was impressed by her total concentration on the game.
intense concentration (=very great concentration)
The job demands intense concentration.
concentration + NOUN
a concentration span (=the length of time that you are able to concentrate)
Young children have a short concentration span.
Examples from the Corpus
concentration• It was only later that the aesthetic dimension of literary study became emphasized, with an accompanying concentration on the fictional genres.• Plummer said she plans to continue her concentration on the 3,000 meter race.• A lack of response would suggest that the high concentration of alcohol is the principal factor.• Used in the right concentrations, they colour hair for up to six washes and add a protective film.• The result is that the concentration of neurotransmitters in a synapse increases and the normal actions of the neurotransmitter is enhanced.• So, supposing I tried, the task would demand total concentration.• His face was solemn with concentration.• A good night's sleep will improve your concentration.
lost ... concentration• They were also tired and when Bath turned again to the Campese option an important part of the Gloucester defence lost concentration.• This inability to translate pressure into points seemed to erode their tenacity and the forwards, in particular, lost concentration.• Even the best sentry lost concentration.• Once, for an instant, she lost her concentration and a smile cracked across her features.• She lost concentration, and the pygmy vanished.• They lost concentration at times with a big lead behind them.• Worst of all the defence totally lost concentration after about eighty five minutes gone.
concentration on (doing) something• The effect of Ca 2+ concentration on the calmodulin modulation of channel activity was also measured using the neutral red dye assay.• The influence of lavage was evaluated by comparing the corresponding concentrations on both days.• He returned to assist Frye, who was standing now with a frown of concentration on his face.• One is Dyck's concentration on systems of generators for a group and on relations satisfied by these generators.• He was kneeling in sober concentration on a flagstone, when suddenly he felt two large paws on his shoulders.• Why all the concentration on genetic engineering?• This concentration on industrial estates is not accidental.• Take care not to relax your concentration on the way up. 2.
concentration of• Tests show high concentrations of chemicals in the water.• California has the largest concentration of Vietnamese outside Vietnam.
high/low concentrations• But the atmospheres of the Jovian planets contain astronomical amounts, and high concentrations, of both helium-3 and deuterium.• In the rat cerebral cortex in the absence of calmodulin, calcium has a negligible effect at low concentrations.• Because of its wide use and toxicity at high concentrations, phenytoin is often the subject of overdose.• The chemical, once used as an anesthetic, can be toxic if breathed in high concentrations.• The same spectrum of peptides was also found in extracts of normal colon mucosa but in still lower concentrations.• Do not exceed the stated dose in the belief that higher concentrations will be more effective.• The high concentrations should not be a problem.• Studies on people exposed to high concentrations of benzene in the workplace have shown it is linked with leukaemia.
From Longman Business Dictionary
concentrationcon·cen·tra·tion /ˌkɒnsənˈtreɪʃənˌkɑːn-/ noun [uncountableU]
ECONOMICS when companies combine to form larger companies, resulting in fewer businesses in an industrySYN CONSOLIDATION
Continental, in a move that underlines the growing concentration of the tire industry, announced the acquisition of a Fiat tire subsidiary.
→ buyer concentration
con·cen·tra·tion noun →n COLLOCATIONS1
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