今日学习统计
今日学习视频时长{$today['video_duration']}
今日学习图文时长{$today['article_duration']}
今日学习音频时长{$today['audio_duration']}
今日学习总时长{$today['total_duration']}
昨日学习统计
昨日学习视频时长{$yesterday['video_duration']}
昨日学习图文时长{$yesterday['article_duration']}
昨日学习音频时长{$yesterday['audio_duration']}
昨日学习总时长{$yesterday['total_duration']}
累计学习时长：{$total_time}