This is heard loudest in the aortic valve and pulmonary valve area.

这个声音可以在主动脉瓣和肺动脉瓣听诊区被清晰地听到。

And because it's basically the tricuspid and mitral valve closing, it's best heard in the tricuspid valve and mitral valve area.

因为它主要是因为二尖瓣和三尖瓣关闭的声音，所以它可以在二尖瓣和三尖瓣听诊区被清晰听到。