1.administer

　　联想记忆：ad(做)+minis(管理)+ter--管理

　　例:administer tribal lands管理部落的土地，//The nasal spray vaccine is not effective when administered to adults.

　　派生词:administration(n.管理：管理部门)：administrative(a.管理的，行政的)

　　2.admit v.(t0)承认(to acknowledge);准许…进入(to allow entry)

　　词根记忆：ad+mit(送)--能送进去--准许…进入

　　例:In a survey of job applicants, two-fifths admitted to being at least a little dishonest.

　　派生词:admittance(n.准入)：admission(n.准许进入)

　　3.adolescent n.青少年( young person between childhood and adulthood);a.青春期的(typical of time between childhood and adulthood)

　　词根记忆：ado(看作adult成人)+lescent(开始或正在形成的)--开始成为成年人的--青少年

　　例:The children of authoritative parents are likely to be responsibly independent as adolescents.

　　派生词:adolescence(n.青春：青春期)

　　4.adoption n.采用，采纳( accepting);收养(taking sb.into one's family, esp.as one's child or heir)

　　词根记忆：来自adopt(v.采用;收养)

　　例:adoption of new technologies采用新技术//There are far fewer children available for adoption than there are people who want to adopt.

　　派生词:adoptive(a.采纳的;过继的)

　　5.advent n.到来，出现( coming into being or use)

　　词根记忆：ad+vent(来)--到来

　　例:The advent of private hospital health insurance guaranteed the private hospital a regular source of income.

　　同根词：intervention(n.干涉)：convention(n.大会;习俗)