両りょう胸むね

noun

both sides of the chest

Refers to the left and right sides of the chest area, not necessarily the breasts themselves.

• 事じ故こで両りょう胸むねを強つよく打うった。

  I hit both sides of my chest hard in the accident.

noun

both breasts

Specifically refers to both breasts, often in medical or descriptive contexts.

• 授じゅ乳にゅう中ちゅうは両りょう胸むねが張はることがある。

  Both breasts may become engorged during breastfeeding.