[praiˈmɔ:diəl]
原始的：具有最简单的和最不发育特征的- extraction
- extractive
- extractor
- extractum
- extracystic
- extradural
- extraembryonic
- extraepiphyseal
- extragenital
- extrahepatic
- extraligamentous
- extramalleolus
- extramastoiditis
- extramedullary
- extrameningeal
- extramitates
- extramural
- extraneous
- extranuclear
- extraocular
- extraosseous
- extraparenchymal
- extrapelvic
- extrapericardial
- extraperineal