n. 胸骨[医] 胸骨
n the flat bone that articulates with the clavicles and the first seven pairs of ribs
1.My heart is a muscular organ with four chambers that's located just behind and spghtly to the left of my breastbone.
我的心脏是一块有四个房室 位于我胸骨内侧 稍微偏左的肌肉