我已经拖延安装了各种各样的原因，但主要是因为它没有播放DVD音频和SACD碟片我曾花了相当数量的金钱和时间追踪。

I had procrastinated installing it for a variety of reasons, but mostly because it didn't play the DVD-Audio and SACD discs I had spent a fair amount of money and time tracking down.

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制作网络课件经常遇到链接错误、图片数据量大、下载时间长、视频音频不能实时播放甚至不能传输等问题。

Many problems such as wrong linking occur while you are making web courseware. The picture data are large, video and audio media cannot be played in real time , and even cannot be transmitted.

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