保持: (维持; 使不消失或减弱) keep; hold; retain; maintain; preserve 短语和例子保持安静 keep quiet; 保持优势 hold on to a dominant [favorable] position; 保持警惕 maintain vigilance; be on the alert; 保持清洁 keep clean; 保持优良传
则: Ⅰ名词1.(规范) standard; norm; criterion 短语和例子准则 norm; standard; criterion; 例则 an example; 以身作则 set an example by one's own conduct; set oneself up as an example2.(规则) regulation; rule; law 短语和
