bone retention

例句：

1. 1. The patient's bone density has improved significantly after the treatment.
   治疗后，患者的骨密度有显著提高。
2. 2.The research focuses on bone loss and its impact on bone retention.
   该研究关注骨丢失及其对骨保存的影响。
3. 3. To prevent bone loss, it is important to maintain good bone retention practices.
   为了预防骨丢失，保持良好的骨保存实践非常重要。