求翻译：正常心脏有两个心音,它们是瓣膜关闭的声音 第一心音是二尖瓣和三尖瓣同时关闭的声音,第二心音是主动脉瓣和肺动脉瓣同时关闭的声音是什么意思？

Normal heart sounds, which are the valvular sound first heart sound is the sound of mitral and tricuspid valve closed at the same time, the second heart sound is the sound of the aortic valve and the pulmonary valve while closing

There are two normal heart heart sounds, they are off of the mitral valve sound the first heart sound is mitral valve 2 and 3 of the mitral valve closed at the same time, and the 2 heart sound is aortic valve and pulmonary valves closing at the sound

The normal heart has two sound of the heart, they are the sound first sound of the heart which the valve shuts down are the sound which the bicuspid valve and the tricuspid valve simultaneously shut down, the second sound of the heart is a sound which the aorta petal and the pulmonary artery petal s

Normal heart two heart, which is the first heart valve closing sound is the voice of mitral and tricuspid valve closed, the second heart sound is the voice of aortic and pulmonary valve closed

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