keep watch on 監(jiān)視keep watch at night 守夜keep watch 看守；值班；放哨；提防keep warm 保暖keep up-to-date 趕時(shí)髦keep up with the joneses 與…攀比，比闊氣；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(shí)期；趕上時(shí)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；不落后keep under wraps 秘而不宣 保密keep under observation 仔細(xì)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(shí)間；掌控時(shí)間keep track of 記錄；與…保持聯(lián)系