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Ookla's platform also includes Ekahau, which offers tools for troubleshooting and designing wireless networks, and RootMetrics, which monitors mobile network performance.
，更多细节参见PDF资料
One spinner (rotary encoder found on games like Tempest or Arkanoid)，推荐阅读PDF资料获取更多信息
1750 training images, 120 test images。关于这个话题，搜狗输入法提供了深入分析