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v (1)聚精會(huì)神，集中(思想，注意，精力等)(keep or direct(all one's thoughts，attention，efforts，etc)on sth，not thinking about other less important things)[I，I+prep(on/upon)，T+n+prep(on/upon)]：She couldn't～with all that noise going on/because it is too hot.一片嘈雜/太熱了，她無(wú)法全神貫注?！玸harply in an effort to understand a speaker極力全神貫注地去理解講話(huà)者的意思;～up (upon) one's studies/one's work/a book/a task/studying/driving/what one is doing/what sb is saying聚精會(huì)神地學(xué)習(xí)/工作/看一本書(shū)/執(zhí)行一個(gè)任務(wù)/學(xué)習(xí)/開(kāi)車(chē)/做一件事/聽(tīng)某人的話(huà);～one's efforts on improving education/one's attention on a problem/one's energy on the study of English/one's whole mind on one thing全力改進(jìn)教育/一心解一道題/全副精力學(xué)英語(yǔ)/一門(mén)心思做一件事;～the (one's) mind 緊張認(rèn)真地思考;

(2)(使)集中(結(jié))，聚集((cause to) come together at one place)[I+prep，T+n+prep]：(birds/troops/crowds)～in the woods(鳥(niǎo)/部隊(duì)/人群)聚集在樹(shù)林中;(clouds)～over the western horizon(云)聚集在西邊地平線上;～gunfire on a town把炮火集中射向一個(gè)城鎮(zhèn);～industrial development/new industries in the south把工業(yè)開(kāi)發(fā)/新工業(yè)集中在南方;～all one's resources on one project把全部財(cái)力集中在一個(gè)項(xiàng)目上;～all the troops/the attack/a powerful fleet at the harbour把所有的部隊(duì)/進(jìn)攻/一支強(qiáng)大的艦隊(duì)集中在那個(gè)港口;(population/modern industry/shops)be～d in large cities(人口/現(xiàn)代工業(yè)/商店)集中在大城市;〖同〗focus，centre;

(3)濃縮(make sth (esp a liquid) stronger by reducing its volume)[T+n]：C～the broth by boiling it. 把肉湯煮濃些。The juice was～d by boiling to get rid of excess water.煮掉多余的水分，果汁就變濃了?！玣ruit juice把果汁濃縮;〖同〗reduce，condense，thicken;〖反〗thin;

→′concentrated adj 集中的，強(qiáng)烈的;濃縮的;?concen′tration n 集中(力);聚集;

n 濃縮物(substance made stronger，esp by removing extra liquid)[C，U]：dishwashing～濃縮洗潔劑;(an) orange juice～濃縮橘子汁;～of clove oil濃縮的丁香油;

【辨異】 1)concentrate 與 focus 都可當(dāng)“聚精會(huì)神”講，如：concentrate (focus) one's attention/one's mind on work。focus(vt)的本義是“使……集中到一個(gè)焦點(diǎn)”，如：focus the sun's rays on sth(把陽(yáng)光聚焦到某物上);concentrate 則是“(使……)集中到一處”(見(jiàn)(2))。2)concentrate與contract²、condense 和compress都是“使減小所占空間但保留其原有內(nèi)容”。contract² 是“(使)收縮”之意，如：contract a muscle(使肌肉收縮);condense是“(增大密度以)使?jié)?壓)縮”之意，如：condense milk/a novel(使牛奶濃縮/壓縮小說(shuō));compress是“(借助于外部壓力)使?jié)?壓)縮”之意，如：compress clay into bricks(把粘土壓成磚);concentrate 則是“去掉不必要的東西而使?jié)饪s”之意。