keep tab on v. 監(jiān)視;記錄keep straight on 一直走下去keep straight 行為正直keep still 保持不動(dòng)keep sth. in mind 記住keep sth to oneself 不讓他人分享;保密keep sth on 穿著keep sth in mind 記住keep step keep something to oneself 對...秘而不宣keep smiling 保持微笑keep smile 保持微笑keep skills fresh and up-to-date [物理學(xué)]使技能可以不斷更新[教育學(xué)]使得技能可以與時(shí)俱進(jìn)keep silent 保持沉默;緘默keep silence 保持沉默,保持安靜keep separate accounts 獨(dú)立核算keep secret 保密;保守秘密keep score 保留得分;在比賽中記分keep sb out of 不讓……入內(nèi)keep sb on 繼續(xù)雇傭某人