Making our way down, between the fourth and fifth rib, next to the left lower border of the sternum, is where you can best hear the tricuspid valve closing.
让我们往下看，在第四肋及第五肋之间，紧靠左胸骨下缘，你可以清晰听到三尖瓣关闭的声音。
Fifth rib
原声例句
Osmosis-解剖与生理
人物档案
Rather than regretting this, Cromwell describes how his man had struck him under the ribs, equating it with the Old Testament idea of striking people under the fifth rib, which showed that enemies of God deserved no mercy.
克伦威尔并没有对此感到遗憾， 而是描述了他的人如何击打他的肋骨下，将其与《旧约》中击打人第五根肋骨下的想法等同起来，这表明上帝的敌人不值得怜悯。
英语百科
Rib cage
The rib cage is an arrangement of bones in the thorax of all vertebrates except the lamprey. It is formed by the vertebral column, ribs, and sternum and encloses the heart and lungs. In humans, the rib cage, also known as the thoracic cage, is a bony and cartilaginous structure which surrounds the thoracic cavity and supports the pectoral girdle (shoulder girdle), forming a core portion of the human skeleton. A typical human rib cage consists of 24 ribs, the sternum (with xiphoid process), costal cartilages, and the 12 thoracic vertebrae. Together with the skin and associated fascia and muscles, the rib cage makes up the thoracic wall and provides attachments for the muscles of the neck, thorax, upper abdomen, and back.
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