PTOabbr.见反面(=please turn over)abbr.动力起飞(=power takeoff)abbr.家长教师联谊组织(=parent-teacher organization)
pto clutch lever动力输出轴离合器操纵杆
ptosis acquisita后天性上睑下垂
PTolemaic systemn.[天]托勒密之天动学说
Ptosis of eyelid上睑下垂
ptosis congenita先天性上睑下垂
ptosis of kidney[医] 肾下垂
ptosis atrophica萎缩性上睑下垂, 睑皮松弛(症)
ptosis operation上睑下垂手术
ptomaine-domainn.专门用餐的地方;食堂;自助餐厅
Ptolemaic theorem托勒米定理