noun ダウンロード 🔗共有 開口部, 穴 A mouth or aperture, such as of a tube, pipe, etc.; an opening. Examples : "the orifice of an artery or vein; the orifice of a wound; the vagina and other orifices" 動脈または静脈の開口部; 傷の開口部; 膣およびその他の開口部 part anatomy body organ AIとチャット語彙ゲーム読解練習