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o·pen-heart surgery AHD[ōʹpən-härtʹ] D.J.[ˈəʊpənˈhɑːt]K.K.[ˈopənˈhɑrt]adj.（形容词）- Surgery in which the thoracic cavity is opened to expose the heart and the blood is recirculated and oxygenated by a heart-lung machine.心内直视外科，开心手术：打开胸腔以暴露心脏的手术，然后通过人工心肺机来供血和氧
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