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open-heart surgery

noun
🔊/ˌəʊpən hɑːt ˈsɜːdʒəri/
🔊/ˌəʊpən hɑːrt ˈsɜːrdʒəri/
 [uncountable]
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  1. a medical operation on the heart, during which the patient’s blood is kept flowing by a machine体外循环心脏手术；心脏直视手术；开心术Topics Medicinec2