strengthening the bones and muscles

例句：

1. 1. The teamis strengthening its defense tostop the opponent's attacks.
   球队正在加强防守以阻止对手的进攻。
2. 2. The scientiststrengthened his research by conducting more experiments.
   科学家通过进行更多的实验来加强他的研究。
3. 3. The company is strengthening its supply chain to improveefficiency.
   公司正在加强供应链以提高效率。