pen (e)- [GK] = almost 几乎，近似
peninsula n. 半岛 [insula = island]
penumbra n. 半影；阴暗交界处[umbra= shadow]
peneplain n. 近似平原，准平原
pent(a)- [GK] = five 五
pentagon n. 五角形 [-gon = a plane figure with . . . angles]
pentagram n. (巫术中用作护身符的）五角星形 [-graw =sth. drawn]
pentathlon n. (田径比赛）五项运动 [athlon = contest]
pentode n. [无]五极管 [-ode=electrode]
petr(o)- [GK] = rock 岩石；petroleum 石油
petroleum n. 石油 [ole = oil]
petrograph n. 刻在岩石上的图文[-graph = sth. drawn]
petrology n. 岩石学 [-logy = the science of]
petrochemistry n. 石油化学
pharmac(o)- [GK] = drug 药
pharmacodynamics n. 药效学 [dynam = work]
pharmacology n. 药理学，药物学 [-logy =the science of]
pharmacopoeia n. 药典 [poe = to make]
phil(o)- [GK] = loving 爱好
philanthropist n. 慈善家 [anthrop = man]
philharmonic a. 爱好音乐的（harmonic a. 和声的）
philosopher n. 哲学家；思想家[soph = wise]
philotechnical a. 爱好工艺的 [techn = art and skill]
phon (o) - [ GK ] = sound 声音
phonautograph n. [物]声波振动记录[auto- = self; -graph = sth. recorded]
phonogram n. 音标文字 [-gram = sth. that records]
phonology n. 音位学；音韵学[-logy=the science of]
phonochemistry n. [化]声化学
phonofilm n. 有声电影
photo- [GK] = light 光；photograph (y) 照相(术)
photograph n. 照片 [-graph = sth. recorded]
photometer n. 光度计 [-meter = a measuring device]
photoconductor n. [物]光电导体（conductor n. 导体）
photochrome n. 彩色照相[chrom = colour]
photocompose n. [印]照相排版 photojournalism n. 摄影新闻工作，摄影报道
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