但二者面临同一个核心挑战：如何把摩擦力降到用户感知不到的程度。
Последние новости
，详情可参考WPS极速下载页
For multiple readers
Apple doesn’t participate in MWC or other trade shows, preferring to show off its products at its own events. This week, it’s releasing a series of new products with hands-on events in select cities.