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BNC: 1564 COCA: 2752
concentration

noun¹

1giving all your attention/effort to sth專心;專注ADJECTIVE | VERB + CONCENTRATION | CONCENTRATION + NOUN | PREPOSITION | PHRASES ADJECTIVEdeep, great, intense高度專注absolute, total絕對/完全專心a look of total concentration on her face她聚精會神的樣子good專注poor不專注exclusive專心致志VERB + CONCENTRATIONdemand, need, require要求專注;需要集中注意力The game requires great concentration.這個遊戲要求注意力高度集中。lose不能集中注意力break, disturb干擾注意力Don's voice from outside broke my concentration.外面傳來唐的聲音,打斷了我的思路。CONCENTRATION + NOUNlapse (especially NAmE) 走神PREPOSITIONconcentration on集中於⋯的注意力his concentration on his writing他對寫作的專注PHRASESa lack of concentration注意力不集中a lapse in concentration, a lapse of concentration走神One momentary lapse in concentration could prove fatal.瞬間的注意力不集中都可能是致命的。powers of concentration專注力She has great powers of concentration for a child her age.就她這個年齡的孩子而言,她的專注力極強。
concentration

noun²

2large number/amount of sth in one place大量聚積ADJECTIVE | VERB + CONCENTRATION | CONCENTRATION + VERB ADJECTIVEelevated, great, heavy, high, large高密度;非常集中;高度集中The greatest concentration of traffic is downtown.交通最密集的地方是商業中心區。low低密度varying變化的密度calcium, glucose, oxygen, salt, etc.鈣的含量、葡萄糖的濃度、氧的含量、鹽的濃度等Evaporation gradually increases the salt concentration of the water.蒸發作用使水中鹽的濃度逐漸升高。geographical地理上的集中VERB + CONCENTRATIONincrease增加含量decrease, reduce降低濃度;減少含量calculate, determine, estimate計算/測定/估計濃度CONCENTRATION + VERBincrease, rise含量增加;濃度升高The concentration of nitrates in the drinking water has risen in recent years.近年來飲用水中硝酸鹽的濃度升高了。decrease, fall濃度下降/降低

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