shoulder bone

同根派生

The humerus is the long bone of the arm.
肱骨是上臂的長(zhǎng)骨。
The antigravity shoulder muscles prepare to bring the arm to shelf level,and the hand is prepositioned and oriented to prepare forgrasp-ing.
當(dāng)伸手動(dòng)作展開(kāi)時(shí)，前肋骨側(cè)邊的肌肉及上下頸部斜方肌會(huì)同時(shí)收縮使肩胛拉開(kāi)向上，而旋轉(zhuǎn)環(huán)膜會(huì)讓肱骨呈外旋的姿勢(shì)，并使得肱骨頭置入關(guān)節(jié)窩。
The scapula is a triangular bone.
肩胛骨是一個(gè)三角形骨。
The bullet hit him squarely between the shoulder blades.
子彈恰巧打在他的肩胛骨之間。