The longitudinal muscle and the intern al anal sphincter in front of the upper part of anal canal were found to be blen ded with the perineal body.是什么意思_The longitudinal muscle and the intern al anal sphincter in front of the upper part of anal canal were found to be blen ded with the perineal body.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句