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1. Oxford American Dictionary

   concentrate

   • IPA[ˈkänsənˌtrāt]

   美式

   • v.
     focus one's attention or mental effort on a particular object or activity；do or deal with (one particular thing) above all others
   • n.
     a substance made by removing water or other diluting agent; a concentrated form of something, especially food

   • verb: concentrate, 3rd person present: concentrates, gerund or present participle: concentrating, past tense: concentrated, past participle: concentrated

2. • 釋義

   v.

   動詞

   • 1. focus one's attention or mental effort on a particular object or activity she couldn't concentrate on the movie 同義詞 focus, direct, center, centralize, bring to bear, ... 更多home in on, zero in on, focus one's attention on, focus on, pay attention to, keep one's mind on, apply oneself to, address oneself to, devote oneself to, get down to, put one's mind to, be absorbed in, be engrossed in, be immersed in, think about closely, consider closely, rack one's brains about/over, cudgel one's brains about/over, informalget stuck into反義詞 dissipate, daydream, let one's mind wander
   • ▪ do or deal with (one particular thing) above all others Luke wants to concentrate on his film career
   • 2. gather (people or things) together in numbers or in a mass wealth was concentrated in the hands of the governing elite
   • ▪ come together in numbers or in a mass troops were concentrating at the western front 同義詞 collect, gather, congregate, draw together, converge, ... 更多mass, cluster, rally, accumulate, amass, rareconcenter反義詞 disperse
   • 3. increase the strength or proportion of (a substance or solution) by removing or reducing the water or any other diluting agent or by selective accumulation of atoms or molecules plants and microorganisms can concentrate metals from the environment 同義詞 condense, boil down, reduce, distill, thicken, ... 更多compress, strengthen反義詞 dilute

   n.

   名詞

   • 1. a substance made by removing water or other diluting agent; a concentrated form of something, especially food apple juice concentrate