bulbospongiosusyoudaoicibaDictYouDict[bulbospongiosus 词源字典]
"(More fully bulbospongiosus muscle) a muscle of the perineum which acts to aid the emptying of the urethra in males, and as a weak vaginal sphincter in females", 1930s.[bulbospongiosus etymology, bulbospongiosus origin, 英语词源]