双生

例句：

1. 1. The two teams are playing a friendly match.
   两队正在举行一场友谊赛。
2. 2. This is a dual-purpose tool that can be used for both cleaning and cooking.
   这是一个多功能工具，既可以用于清洁也可以用于烹饪。
3. 3. Dual SIM cards allow users to have multiple phone numbers on one device.
   双卡手机允许用户在一个设备上拥有多个电话号码。