/ˌkɒnsnˈtreɪʃn ||; ˌkɑnsṇˈtreʃən/noun1 [U] concentration (on sth) the ability to give all your attention or effort to sth 专注；专心: This type of work requires total concentration. 做这种工作需要全神贯注。Don't lose your concentration or you might make a mistake. 别分心，不然你会犯错误。
2 [C] concentration (of sth) a large amount of people or things in one place 汇集；密集；集中: There is a high concentration of chemicals in the drinking water here. 这里的饮用水化学物质含量很高。