增加了芹菜炒牛肉的新方法。加入这种成分，肉质变得嫩滑。芹菜好吃，吃的时候特别香。 今天给大家推荐一个芹菜做法。以前是用芹菜烧烤，今天加了泡豆，变成了……

Quick, name a smartphone that can work with two SIM cards at the same time. Not too many models spring to mind, right? That's because dual-SIM smar……