supplemental equipment

例句：

1. 1. The teacher provided additional explanations to help us understand the concept better.
   老师提供了额外的解释，帮助我们更好地理解这个概念。
2. 2. The company added a new product line to its portfolio.
   该公司增加了一个新的产品线到其投资组合中。
3. 3. The research team collected supplementary data to support their findings.
   研究小组收集了补充数据来支持他们的发现。