Fluctuating bars of service, random outages, not running entirely, shutting down the phone - the complaints on the Apple forums and throughout the blogosphere have ranged pretty extensively.
起伏不定的信号格，随意就无服务，完全不工作，电话停机——从苹果社区到博客世界，已经是牢骚遍地。
2
Several visualization methods of displaying clustering results were realized, it includes the chart of random points, order points, electron cloud, bars and pie.