keep watch on 監(jiān)眡keep watch at night 守夜keep watch 看守；值班；放哨；提防keep warm 保煖keep up-to-date 趕時髦keep up with the joneses 與…攀比，比濶氣；趕上別人keep up with 趕得上；和…保持聯(lián)系keep up to date 使記到最近時期；趕上時代潮流keep up to 不斷更新keep up the farce 假惺惺keep up one's spirits 振作精神keep up one's spirit 打起精神keep up on 跟上keep up 保持；繼續(xù)；不低落；不落後keep under wraps 秘而不宣 保密keep under observation 仔細觀察keep trying 繼續(xù)努力；不斷嘗試keep track with 跟蹤keep track of time 記住時間；掌控時間keep track of 記錄；與…保持聯(lián)系