Cross your arms over your chest, so that the fingers of your left hand would be under your right clavicle and the fingers of your right hand would be under the left one.
B is for bones, start by looking at both clavicles and all twelve pairs of ribs one at a time to make sure that there are no fractures, deformities, or missing bones.
We're primates, and only amongst primates do humans and our ancestors have this very characteristic S-shape, and at that time I was probably one of the world's only experts on hominin clavicles.
我们是灵长类动物,只有在灵长类动物中,人类和我们的祖先才会有这种非常有特点的 S 型,当时我可能是世界上唯一研究人科动物锁骨的专家之一。