substernal

例句：

1. 1. He lay on his back, feeling the substernal pain in his chest.
   他仰卧着，感觉到胸骨下方的疼痛。
2. 2. The doctor advised him to rest and avoid activities that might cause strain on the substernal area.
   医生建议他休息，避免做可能对胸骨下方造成压力的活动。
3. 3.During his recovery, he was advised to keep his substernal area elevated to reduce swelling.
   在他康复期间，他被建议抬高胸部以减少肿胀。