The incorporation of touch screens into portable devices is one driver of this growth.
把触摸屏集成到便携式设备是增长的动因之一。
2
Taxi driver: It's a portable TV. It's a popular thing now.
出租车司机：这是个移动电视，现在非常流行。
3
The driver designed in this paper can support portable storage device and HID device. It is helpful for the developing of other embedded USB host driver.