concentrate on be absorbed in in a world of one's own put one's back into it with great presence of mind
动词词组：concentrate on focus on be absorbed in put all your heart in to it名词：cathexis
full concentrationfully concentrated on sth
comma focus
comma 逗号to be absorbed in to keep (or fix) one's mind on to concentrate one's attention to bend one's mind to to give one's mind to全神贯注（专心于…）
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我是豆豆豆逗
