abbr.泛美航空公司（PanAmericanWorldAirways）
n.（Paa）人名；（芬）帕
insectivora species───食虫纲
ass pillow───屁股枕头
onwards and upwards───天天向上；勇往直前；一直进步
collectorship of port new york───纽约港收藏家
stratified random sampling───分层任意抽样，分层随机抽样，分层随机取土样
pebbly jack───卵石杰克
accentual phrase───重音短语
imprecation means───恳求的意思
upland lowlife───高地低地生物
estancia lapacho───拉帕乔
The extent of skin spine exists in the males of Paa, which become a natural group.───该属动物雄性具有发达程度不同的皮肤棘，而成为一个自然类群。
Peudolaric acid a (PAA); S180 cells; Apoptosis of tumor cells.───土槿甲酸；肉瘤180细胞；瘤细胞凋亡。
Crystallization process and different phase transitions of PAA template were investigated.───研究了PAA模板的晶化行为和相转变过程。
The finely grounded PAA was crystal polymer and its structure unit arranged periodicity with a little crystal lattice disfigurement.───分离得到的PAA为结晶聚合物，结构单元呈周期性排列，但存在一定的晶格缺陷。
PAA had the protective effect against the cochlear ototoxicity of GM without decreasing its antimicrobial activity.───PAA对庆大霉素的耳毒性具有拮抗作用，且不减低其抗菌活性。
The stability of the suspension is affected by the the pH value and the concentration of the dispersant, gum arabic and the electrolyte.───实验表明悬浮料液的pH值、分散剂PAA、阿拉伯树胶及电解质等的浓度对料浆的稳定性均有影响。
Porous anodic alumina (PAA) formed in acid solution by anodizing of metal aluminum has porous structure with ordered nanopore arrays.───金属铝在酸性溶液中阳极氧化得到的多孔性氧化铝薄膜具有有序排布的纳米量级的孔阵列。
A flexible polyacrylamide(PAA~*)hydrogel with entrapped polyelectrolyte sulfonated polyaniline(SPANI)was prepared.───制备了含有聚电解质磺化聚苯胺（SPANI）在的聚丙烯酰胺凝胶。
Objective : Examine penicillin to ferment phenylacetic acid ( PAA ) in liquid remnants quantity.───目的：检测青霉素发酵液中苯乙酸（PAA）残量。