perceive [ p?'si:v ] v.察覺，發(fā)覺 perceptibly [ p?'sept?bli ] adv.可察覺地，可辨地 perennial [ p?'reni?l ] adj.長(zhǎng)期的； n.多年生植物 perfunctory [ p?'f??kt?ri ] adj.草率的；敷衍的 perimeter [ p?'rimit? ] n.周長(zhǎng) periodical [ ,pi?ri'?dikl ] adj.周期的，定期的；期刊的； n.期刊 periphery [ p?'rif?ri ] n.外圍 permanent [ 'p?:m?n?nt ] adj.永久的；固定的 permeate [ 'p?:mieit ] v.擴(kuò)散；滲透 permit [ p?'mit ] v.允許，許可 permit [ 'p?:mit ] n.通行證，許可證 pernicious [ p?'ni??s ] adj.有害的；致命的 perpendicular [ ,p?:p?n'dikjul? ] adj.垂直的 perpetrator [ 'p?:pitreit? ] n.作惡者，犯罪者 perpetuate [ p?'pet?ueit ] v.延長(zhǎng)…的存在，使永記不忘 perplex [ p?'pleks ] v.使（某人）困惑；（使）復(fù)雜化 persecute [ 'p?:sikju:t ] v.迫害 persist [ p?'sist ] v.堅(jiān)持；繼續(xù) personnel [ ,p?:s?'nel ] n.全體人員；人事部門 perspective [ p?'spektiv ] n.（看待事物的）角度，觀點(diǎn) pertinent [ 'p?:tin?nt; 'p?:t?n?nt ] adj.相關(guān)的 perturb [ p?'t?:b ] v.打擾；【天】攝動(dòng)（引起天體軌道變化） pervasive [ p?'veisiv ] adj.普遍的，流行的 perversion [ p?'v?:?n; p?'v?:?n ] n.曲解，顛倒 pesticide [ 'pestisaid ] n.殺蟲劑 petition [ p?'ti?n ] n.請(qǐng)?jiān)福徽?qǐng)?jiān)笗?petroleum [ p?'tr?uli?m ] n.石油 pharmacy [ 'fɑ:m?si ] n.藥房 phase [ feiz ] n.階段 philanthropic [ ,fil?n'θr?pik ] adj.慈善的，樂善好施的 philosophy [ fi'l?s?fi ] n.哲學(xué)；哲理，見解 photon [ 'f?ut?n ] n.光子，光量子 photosynthesis [ ,f?ut?u'sinθ?sis ] n.光合作用 physiology [ ,fizi'?l?d?i ] n.生理學(xué)；生理機(jī)能 pigment [ 'pigm?nt ] n.天然色素；干粉顏料 pinpoint [ 'pinp?int ] v.精確定位；準(zhǔn)確解釋或確定