DVDVideoSoft Free: a pretty basic software to edit video and audio files.

DVDVideoSoft免费版：一个编辑视频和音频文件的基本软件。

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A basic, ad-supported service is free; the upgraded version, with no ads and higher-quality audio, is $36 a year.

有广告的基本服务是免费的，升级后的版本没有广告，而且有更高质量的声音效果，三十六美元一年。

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The second is that covering photo, video and audio portals has long been a basic and cheap security safeguard.

其次，遮住照片、视频和音频入口向来是一种划算的基本安全保护措施。

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UNESCO, in collaboration with the Public Service Broadcasting Trust (PSBT), created a series of instructional how to videos to provide basic, conceptual and technical understanding of the audio-visual film production, with the special focus on the independent documentary.

UNESCO: Communication and Information

The basic idea is to start the game off in a primarily audio-based murder mystery scenario where "actual forests, skyscrapers, and rivers" become part of the story, giving children (or adults, too) a way to virtually interact with their surroundings while traveling.

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