semi-closed valve半: half活瓣: valve; flap紧闭: closeness; firmly together活瓣: [生理学] (瓣膜) valve; flap半紧逼: semi-press下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:半紧闭活瓣，即可在微信中查询翻译
