closed portion

程式设计语言"_馆档网 ... "闭合多边形"," closed polygon" "闭合部分"," closed portion" "闭合程序"," closed procedure" ...

封闭部 (closed portion) -- 含有脊髓中央管 (central canal)开放部 (open portion) - 形成第四脑室 (fourth ventricle) 底部含有第...