But it is still a common (truant) childhood disease in developing countries. (Weakens) rickets can cause bone pain and weakness, teeth problems and muscle (lose) loss.

• 现在在西部国家中软骨病已经很少见了，但在发展中国家中，软骨病仍然是很常见的儿童疾病。软骨病可以造成骨胳疼痛和虚弱，牙齿问题和肌肉衰退。