Another reason why some older people shrink is because of osteoporosis (say: oss-tee-oh-puh - ro -sis). Osteoporosis occurs when bone is broken down and not enough new bone material is made.

另一个为什么一些老年人会变矮的原因是骨质疏松症(说：oss - tee - oh - puh - ro - sis)骨质疏松症发生于当骨头被打破而却没有足够的新骨头原料来制造的时候。

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