(1)記憶することによって
(2)by committing to memory
(3)by committing to memory; "she knew the poem by heart"
さらに詳しく
(1)有頂天な態度で
(2)in an exultant manner
(3)in an exultant manner; "it was exultingly easy"
(1)制御の下にあるさま
(2)under control
(3)under control; "the riots were in hand"
