duocards

例句：

1. 1. The new phone has a dual-SIM card slot, which allows you to use two SIM cards atthe same time.
   这款新手机有一个双SIM卡槽，可以让你同时使用两张SIM卡。
2. 2. The dual-core processor is designed to improve performance and reduce power consumption.
   双核心处理器旨在提高性能和降低功耗。
3. 3.In a dual-boot system, both operating systems are installed on separate drives.
   在双启动系统中，两个操作系统分别安装在不同的驱动器上。