 Section21-25
            Section21-25    activity の語源と意味
        DUO3.0の英単語見出し番号1147と英文番号247。act 行動  +  -ive(形容詞化)+ -ity(名詞化)。【シナプス・ポイント】act  と   -ive   と -ity  を繋げると、行動的なこと → 活動、活動的な状態、にぎやかさ      
                        
     Section21-25
            Section21-25     Section21-25
            Section21-25     Section16-20
            Section16-20     Section31-35
            Section31-35     Section31-35
            Section31-35     Section31-35
            Section31-35     Section31-35
            Section31-35     Section21-25
            Section21-25     Section26-30
            Section26-30     Section26-30
            Section26-30     Section21-25
            Section21-25     Section16-20
            Section16-20     Section01-05
            Section01-05     Section31-35
            Section31-35     Section36-40
            Section36-40     Section36-40
            Section36-40