短语词组短语coronal activity 星冕活动;日冕活动coronal streamer [天]冕流coronal arch [天]冕拱Coronal valve 冠状瓣coronal hele 冕洞coronal leakage 冠方渗漏radiation coronal 放射冠coronal anatomy 冠状断层解剖coronal gingiva 牙冠龈 返回 coronal