PAA
abbr. 泛美航空公司（Pan American World Airways）
例句
Peudolaric acid a (PAA); S180 cells; Apoptosis of tumor cells.
土槿甲酸；肉瘤180细胞；瘤细胞凋亡。
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。
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。
