在和IBM合作的时候，他要求只是授权使用DOS而不是买断，的翻译：At the time of working with IBM, he requested only authorizes the use of DOS instead of buying, 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

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At the time of working with IBM, he requested only authorizes the use of DOS instead of buying,

In cooperates with IBM, but he requests only is the authorization uses DOS is not sells outright,

At the time, he and IBM cooperation request was only authorized to use DOS rather than buy.

At the time of working with IBM, he requested only authorizes the use of DOS instead of buying,