1.purification n．净化，提纯(the act or an instance of purifying or of being purified)
词根记忆：来自purify(v.净化；使……纯净)
例：water purification method水质净化方法
同根词：purge(v.使清净)

2.Puritan n．清教徒(a group of English Protestants in the 16th and 17th centuries who lived in a very strict and religious way)；a．清教徒的(of or relating to puritans)

词根记忆：pur(=pure纯洁)+itan——讲究道德纯洁——清教徒
例：The ideas and institutions developed by New England Puritans had powerful effects on North American culture.
派生词：Puritanism(n．清教徒主义)

3.purport n.意图(intention);v.声称(to claim)
注意：purpose(n．目的)
例：The book purports to be an original work but is really a compilation.
派生词：purportedly( ad.据称)

4.pursue v.追求(to seek)；追击(to follow in order to capture, kill, or defeat)；继续(to proceed with)
词根记忆：pur(向前)+sue(求)——向前追——追求
例：pursue pleasure追求快乐//Police were trying to pursue criminal copyright infringers.//The government decided to pursue its conservative economic policies.
派生词：pursuit(n.追求；研究)

5.purview n．（工作、活动等的）范围(range of operation or activity; scope)

6.putty n.油灰(a dough like material typically made of whiting and linseed oil that is used especially to fasten glass in window frames and to fill crevices in woodwork)；易被摆布的人（one who is easily manipulated）
例：The plumber sealed the joint in the pipes with putty.

7.pyramid n．角锥(solid figure of this shape with a base of three or more sides);金字塔(an ancient massive structure found especially in Egypt having typically a square ground plan, outside walls in the form of four triangles that meet in a point at the top)
例：The chambers inside the pyramid of the Pharaoh Menkaure(门卡乌拉法老王)were closed to visitors for cleaning.

8.quadrant n．象限（被坐标轴分开的平面中的四个区域的任一个）(an instrument with an arc of 90 degrees marked off in degrees, for measuring angles)
词根记忆：quadr(四)+ant——由四个部分组成的——象限
例：quadrant IV 第四象限
同根词：quadrilateral(n．四边形)

9.quadruple v.（使）成四倍(to become four times as great or as numerous)
词根记忆：quadru(四)+pIe(加)——加四次——成四倍
例：A certain culture of bacteria quadruples every hour.