当然，Android是一款出色的智能手机操作系统。
目前，Symbian仍然是全球最大的中低端智能手机操作系统。
Symbian is the biggest player in mid - to lower range smartphones globally right now.
一个新的具有广泛风险的，基于塞班智能手机操作系统的漏洞昨天被公布。
A new exploit for a wide range of Symbian OS-based smartphones was made public yesterday.
我们目前尚不清楚，智能手机领域究竟能够支持多少种相互竞争的操作系统。
It is not yet clear how many competing operating systems the world can really support.
我妈最近买了一台智能手机，操作系统是安卓。
我妈最近买了一台智能手机，操作系统是安卓。
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