Bedeutung von “concentrate” im Essential American English Dictionary

concentrate

verb us /ˈkɑn·sənˌtreɪt/ present participle concentrating, past tense and past participle concentrated

B1 to think very hard about the thing you are doing and nothing else:

Be quiet – I’m trying to concentrate.
I can’t concentrate on my work. It’s too noisy.

(Definition von “concentrate” aus dem Webster's Essential Mini Dictionary © Cambridge University Press)