v. 专心于( concentrate的第三人称单数 ); 注意; 集中; 聚集

n the desired mineral that is left after impurities have been removed from mined ore

n a concentrated form of a foodstuff; the bulk is reduced by removing water

n a concentrated example of something

v make denser, stronger, or purer

v direct one's attention on something

v make central

v make more concise

v draw together or meet in one common center

v compress or concentrate

v be cooked until very little liquid is left

v cook until very little liquid is left