英日字典: one_by_one
    The one_by_one has 3 Senses.
-  one at a time, one by one, one after another
-  つぎつぎと, つぎつぎに, 次々, 次々に, 次次に, 次々と, 次次と, 次次, つぎつぎ
- in single file; "the prisoners came out one by one"
- 一列縦隊で
-  one by one, by the piece
- one piece at a time; "she sold the plates by the piece"
- 時間の一部
-  severally, singly, one by one, individually, separately, on an individual basis
-  個々, 個個に, 逐一, 一々, 個々に, 一一, 個別的に
- apart from others; "taken individually, the rooms were, in fact, square"; "the fine points are treated singly"
- 他を除いて