1.pervasive a．普遍的，流行的(spreading throughout every part of)

詞根記憶：來(lái)自pervade(v.遍及)

例：The ideology of eighteenth-century America was pervasive among farmers in early America.

2.perversion n.曲解，顛倒(the action of perverting)

詞根記憶：per(始終)+vers(轉(zhuǎn))+ion--始終轉(zhuǎn)過(guò)去--顛倒

例：This movie is a perversion of the author's book.

同根詞：reverse(v.顛倒，倒退)

3.pesticide n.殺蟲劑(an agent used to destroy pests)

詞根記憶：pest(害蟲)+i+cide(殺)--殺害蟲的東西--殺蟲劑

例：chemical pesticide化學(xué)殺蟲劑

4.petition n.請(qǐng)?jiān)福╡ntreaty）；請(qǐng)?jiān)笗?a formal written request)

詞根記憶：pet(尋求)+ition--尋求（幫助）--請(qǐng)?jiān)?/p>

例：Do you want to sign a petition for statewide smoking restriction?

5.petroleum n．石油(mineral oil occurring in many places in the upper strata of the earth which is prepared for use as gasoline naphtha, or other products by various refining processes)

詞根記憶：petro(石)+leum--石油

例：The petroleum company has recently determined that it could cut its refining costs.

6.pharmaceutical a．制藥的(of the manufacture and sale of medicines)

詞根記憶：來(lái)自pharmacy(n．藥房；藥劑學(xué))

例：No industries other than the pharmaceutical industry have asked for an extension of the 20-year limit on patent protection.

同根詞：pharmaceutics(n.制藥學(xué))