動詞 concentrate:

1. make (the solvent of a solution) dense or denser
   同義詞：concentrate
2. direct one's attention on something
   同義詞：concentrate, focus, center, centre, pore, rivet
3. make central
   同義詞：centralize, centralise, concentrate
4. make more concise
   同義詞：digest, condense, concentrate
5. draw together or meet in one common center
   同義詞：concentrate
6. compress or concentrate
   同義詞：condense, concentrate, contract
7. be cooked until very little liquid is left
   同義詞：boil down, reduce, decoct, concentrate
8. cook until very little liquid is left
   同義詞：reduce, boil down, concentrate

形容詞 concentrated:

1. gathered together or made less diffuse
2. of or relating to a solution whose dilution has been reduced
3. intensely focused
4. (of light) transmitted directly from a pointed light source
   同義詞：hard
5. being the most concentrated solution possible at a given temperature; unable to dissolve still more of a substance
   同義詞：saturated

1. He concentrated on his new job.
   他專注于新工作。
2. They concentrated on better definition of the optical image.
   他們致力於提高該光學影像的鮮明度。
3. These noisy conditions aren't really conducive to concentrated work.
   這嘈雜的環(huán)境實在不利於專心工作。
4. The crowds concentrated round the palace.
   人群匯集在宮殿的四周。