求翻译：十年前，手机、PDA等移动终端价格异常昂贵，持有者尚少，时至今日，仅手机持有者已达6.4亿，使用手机上网的网民也达到1.176亿，2007年国内用户的手机更换量就达2亿部。此外，不同性能、屏幕尺寸、样式的移动终端已基本满足移动学习的硬件需求，虽然目前我国移动学习研究与应用存在较多局限与不足，但随着数字化时代的推进，相信在下个十年我国移动学习必将开展得更快、更好、更强。是什么意思？

Ten years ago, mobile phones, pda mobile terminal price is very expensive, the holder is still less, to date has reached 640 million, only the mobile phone holders, mobile Internet users has reached 117.6 million in 2007, the domestic users of mobile phones replace the amount of $ 200 million. In ad

Ten years ago, mobile phones, mobile terminals such as PDA extremely expensive price, the holder is still less, to this day, is only a phone holder has up to 640 million, and use the Internet on their phone and the Internet to 117.6 million in 2007, the domestic user to replace the phone up to 200 m

A decade ago, mobile phone, PDA and other mobile terminal exception is expensive, holders are still relatively few, to date, only phone holder is up to 640 million, using the mobile netizens reached 117.6 million, 2007 domestic users of cell phones replace the amount of 200 million units. In additio