スピーキングチャレンジ Why Is Your Grandma So Short?

今日のスピーキングチャレンジ

As they've aged, their cartilage has shrunk, their bones have worn down, and their muscles have deteriorated.

彼女たちは年をとるにつれて軟骨組織が縮んでいき、骨はすり減っていき、筋肉は弱まっていきます。