noun 下载 🔗分享 孔, 洞口。 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" 动脉或静脉的孔口；伤口的洞口；阴道和其他孔口。 part anatomy physiology 与AI对话词汇游戏阅读练习
