照相術 zhàoxiàngshù photography Definitions Defs Origin Strokes Stroke Words Sentences Sents 显微照相术 xiǎnwēizhàoxiàngshù microphotography microphotography; photomicrography; photomicroscopy正电子发射断层照相术 zhèngdiànzǐfāshèduàncéngzhàoxiāngshù positron emission tomography positron emission tomography (PET)