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to turn one's head; to look over one's shoulder; to turn around; to look back
to think back (on); to reminisce; to look back (on); to reflect (on)
名前を呼ばれて思わず振り返りました。
I turned around when my name was called.
過去を振り返って反省することも大切だ。
It's also important to look back and reflect on the past.
一年を振り返る特番が放送された。
A special program looking back on the year was broadcast.