判若天渊: it is as far apart as the sky and an abyss.; as far apart as sky and sea; the difference is as between high heaven and the deep sea.; the difference is as great as that between the heavens
相隔: be separated by; be apart; be at a distance of 短语和例子相隔不久 soon afterwards; before long; 相隔多年 after a lapse [an interval] of many years; 相隔十公里 be ten kilometres apart; 相隔千山万水 be separated by
相隔千山万水: be separated by numerous rivers and mountains
