1.proportional a．(to)成比例的：均衡的(corresponding in size degree, or intensity)
例：The drugs' effectiveness against pain is proportional to their success in blocking this enzyme at the site of injury.
派生詞：proportionally( ad.按比例地)

2.proprietary a．所有的，私人擁有的(of relating to, or characteristic of a proprietor)
詞根記憶：propri(本身所有的)+etary——所有的
例：proprietary rights所有權

3.prorate v.<美>按比例分配( to divide or distribute proportionately)
詞根記憶：pro(贊成)+rate(比率)——按比例分配
例：prorate dividends按比例分紅

4.prose n.散文(written or spoken language that is not in verse form)
聯(lián)想記憶：p+rose(玫瑰)——散文如玫瑰花瓣，形教而神聚
例：Victorian women did write the first-rate prose and poetry.
派生詞：prosaic(a．散文的)

5.prosecute v.對…提起公訴(to bring legal action against for redress or punishment of a crime or violation of law)
例：Few individuals are prosecuted for violating gun control laws.
派生詞：prosecution(n．起訴；經(jīng)營)

6.prosecutor n.檢察官(a public official who charges sb. officially with a crime and prosecutes them in court)；起訴人，原告(a person who institutes an official prosecution before a court)
聯(lián)想記憶：pro（前）+secu（追隨）+tor（人）——追隨你到法院門前的人——起訴人
例：Chief Public Prosecutor 首席檢察官

7.prospoct n.前景：期望(anticipation)
詞根記憶：pro（向前）+spect（看）——向前看——前景；期望
例：Undergraduates choose their major field primarily based on their perception of job prospects in that field．
派生詞：prospecting（n．勘探）

8.prospective n．預期，展望(anticipation)；a．未來的：預期的(relating to or effective in the future)
詞根記憶：pro（向前）+spect（看）+ive——向前看的——未來的；預期的
例：The following appeared in a letter to prospective students from the admissions office at Plateau College.
派生詞：prospectively( ad.盼望中)
同根詞：spectator(n.觀眾，旁觀者)

9.prosper v.興隆(to thrive)；成功(to succeed)
詞根記憶：pro(在前)+sper(希望)——希望在前——興隆；成功
例：When people have a personal stake in something, they think about it, care about it , work to make it prosper.
派生詞：prosperous(a．繁榮富強的)