concentrate on the project
その計画に一心に取り組む
concentrate the [one's] mind
考えを集中させる
concentrated fruit juices
濃縮果汁
concentric circles
《数学》同心円
conceptual art
概念芸術(◇作品よりも制作コンセプトを重視する)
concerto grosso
合奏協奏曲
conclude a business deal
商取引を結ぶ
conclude [make, arrange] a peace treaty with ...
…と平和条約を結ぶ
conclude by saying [with the remark] that ...
…と言って話を終える
conclude the investigation
捜査を終了する