Pin bone
臀角，坐骨結節
?? 詞語組成解析
pin
[pin]
n. 釘;別針，扣針，飾針;大頭針;沒價值的東西;
vt. 壓住;（用釘等）釘住，釘住，別住，扣住;用障壁等)圍住，關住（俚語）抓住;[軍]牽制;
adj. 針的;釘的;銷的;大頭針的;
bone
[bon]
n. 骨頭;尸骨;骨質物;有…樣的骨頭的;
vt. 挑魚刺，剔骨頭;剔去…的骨;
vi. 苦學;專心致志;
??? 情景例句
You know I'm very excited about his arrival.
知道我對他的到來是多么興奮。
To mention the wolf's name is to see the same.
說到曹操，曹操就到。
I went there three days ago.
我三天前去過那兒。