常見(jiàn)例句The forked bone anterior to the breastbone of most birds,formed by the fusion of the clavicles.鳥(niǎo)胸的叉骨,如願(yuàn)骨大多數(shù)鳥(niǎo)胸骨前部的叉形骨,因鎖骨郃竝形成的。 返回 breast bone