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1.The heart valves are crucial to the proper functioning of the heart.
心脏瓣膜对于心脏的正常功能至关重要。
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2.During surgery, the surgeon carefully removes the damaged tissue from the left ventricle.
在手术中，外科医生小心地从左心室移除受损的组织。
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3. The patient's condition improved significantly after the surgery, and he was discharged from the hospital on the first day.
手术后，患者的病情显著改善，并在第一天出院。