holdingsn.股份；收藏品名词holding的复数形式.holdingn.股份；耕地；举行；收藏品动词hold的现在分词形式.holding capacitor存储电容器holding down clip卡子holding reductant支持还原剂holding potential保持电位； 控制电位holding back urine憋尿holding water rate持水率holdings resources馆藏资源holding components支持部件holding basin pond贮水池, 蓄水池holding air attack牵制性空袭