duotype

例句：

1. 1. The company has a dual role in the market.
   该公司在市场中扮演着双重角色。
2. 2.The research aims to understand the dual impact of technology on society.
   这项研究旨在理解技术对社会的双重影响。
3. 3. The two leaders agreed to work together for the common good.
   两位领导人同意为了共同的利益而合作。