いっしんいったい

いっしんいったい 【一進一退 】▸ 一進一退の試合 a seesaw game .▸ 彼の病状は一進一退だ His condition is uncertain: it is the repetition of getting better or worse .▸ 我が国の経済は一進一退だ The economy of our country is taking one step back for each step forward .