净: clean保持: keep; hold; retain; maintain ...量: measure capacity保持量: maintenance dose初保持量: initial retention初始保持量: initial retention平均保持量: average retention化学剂保持量: retention净干盐保持量: retention by assay原保持净保险收入: original net retained premium income甘油保持量试验: glycerol-retention test持量: field component净保费: net premium磁持量: magnetic-field component维持量: maintenance dose净保留时间: net retention time净保留体积: net retention volume净保险费: net premium原净保险费: original net premium综合支持量: aggregate measure of support; ams保持: (维持; 使不消失或减弱) keep; hold; retain; maintain; preserve 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; 保持优良传统 preserve good traditions; 保持劳动人民的本色 retain the characteristics of the working people; 保持冷静的头脑 keep a cool head; keep cool; 保持跳高纪录 retain the high jump record; 保持优良品质 retain the fine qualities; 保持党政机关的廉洁 keep the party and government departments honest and clean; 保持活力 maintain vitality; 保持均势 maintain parity; 保持安全距离 wide berth净保留额条款: net retained lines clause净保险费总额: gross net premium一次净保险费: net single premium原净保险收入: original net premium income