柯林斯词典breastbone /ˈbrɛstˌbəʊn/ (also breast bone) (breastbones) 1. N-COUNT Your breastbone is the long, flat bone that goes from your throat to the bottom of your ribs and to which your ribs are attached. 胸骨 返回 breastbone剑桥词典a long , flat , vertical bone in the centre of a person's or animal's chest 胸骨 返回 breastbone