名词
中文翻译：瓣膜
同义词：
['valve', 'flap', 'valve leaf']
例句：
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1. The heart has four main valves that control the flow of blood.
心脏有四个主要的瓣膜，控制血液流动。
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2. The scientist discovered a new type of valve that could improve heart surgery outcomes.
科学家发现了一种新的瓣膜，可以提高心脏手术的成功率。
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3. The patient had to have surgery to replace the damaged valve.
患者不得不接受手术来替换受损的瓣膜。