- (both) up and down tracks (lines)
上下線
じょうげせん
- both (railway) tracks: both (railway) tracks上下線じょうげせん
- cover up one's tracks: {1} : 足跡を隠す、自分の行動の形跡[証拠]を隠す--------------------------------------------------------------------------------{2} : (犯罪者などが)証拠を残さずに去る
- grow up on the wrong side of the tracks: 低所得地域{てい しょとく ちいき}で育つ