英语语法分析

Lift your sternum toward the ceiling and expand it side to side.

向天花板的方向提起你的胸骨并向两侧伸展。

Conversely, ankle, wrist, and sternum injections appear to be less safe.

相反，踝关节、腕关节和胸骨注射似乎不那么安全。

Press the skin of your back in toward your sternum to assist these actions.

压你后背的皮肤向胸骨的方向辅助这些动作。